Electric Current Problems With Solutions Pdf


” 1 This Guide uses the above definition of “electric vehicle” (EV), but limits the scope to passen-ger vehicles that draw current from a rechargeable storage battery. Hints and solutions. As current. Electricity and magnetism go together as electrons are the cause of magnetic fields and magnets can cause electric currents. What is the resistance in a circuit if a potential difference of 110 V causes a current of 10 A? 9. ANSWERS to CIRCUITS. Increases Electricity From Magnetism Review and Reinforce a. A calculator is allowed. ANSWERS 5 ANSWERS Chapter 3 SECTION CHECKUPS Section 3-1 The Zener Diode 1. and Canada. This set of 34 problems targets your ability to determine circuit quantities such as current, resistance, electric potential difference, power, and electrical energy from verbal descriptions and diagrams of physical situations pertaining to electric circuits. It is the heating effect of current due to resistance of wire that flow of current. Harini Rajan on August 2, 2014 In this article you can find 100 Multiple Choice Questions Related to Current Electricity of Physics with answers. A large number of analytical tools are also provided at the end of test. is the current flowing is the change in electric charge is the change in time. ) Problem 9. 4 DC Motors 4. Option A is also wrong because a volt is used as a unit of electrical pressure which causes current to flow in a circuit. Download pdf je electrical questions answers in hindi. An electric eel is a fish that makes its own electricity ,Lightning is spark of electricity in the air and bulb uses electricity to glow. com provides step by step solutions for Selina Concise ICSE Solutions for Class 10 Physics Chapter 8 Current Electricity. Short circuit? Submit the adjacent form and receive multiple. While this is good, there is a much better way. If a bulb connected directly to a 6 V battery glows brightly when 1 A of current passes through it, what is the resistance of the bulb at that point?. Short Answer Questions Q10. (b) Direct current. This is a common problem. generator 6. Electrons and Holes in Semiconductors by William Shockley [1], published in 1950, two years after the invention of the transistor. A path that an electric current follows is a circuit. This unpredictable event will happen very suddenly and will greatly impact the motor. No change. The problems can present themselves in a number of different ways, and resolving the problem is obviously very specific to each situation. Free PDF download of NCERT Solutions for Class 10 Science (Physics) Chapter 13 - Magnetic Effects of Electric Current solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Like the previous question, this question tests your understanding of the mathematical relationship between power, current, voltage and resistance. It is known that the current in ammeter A1 is 6. Many industries have successfully implemented ergonomic solutions in their facilities as a way to address their workers' MSD injury risks. After each of the electrical problems I give an explanation or a resource from this or another website. Now the magnetic fields of adjacent wires add together to form one strong magnetic field. Introduction of Electrochemical Concepts • Electrochemistry - concerned with the interrelation of electrical and chemical effects. Electric Current. Flow of current is flow of positive charge from the positive terminal of the battery to the negative terminal of it. An object is connected to a source of electric energy and the current flowing in the circuit is constricted. For any content/service related issues please contact on this. The first sheet gives pupils a series of different circuits and ammeter readings where pupils have to work out the missing values. In 1800, Nicholson and Carlisle, using Volta's primitive battery as a source, showed that an electric current could decompose water into oxygen and hydrogen. All Chapter 13 - Magnetic Effects of Electric Current Exercise Questions with Solutions to help you to revise complete Syllabus and Score More marks. An electric circuit consists of electric power source, wires, switches and electric. If you understand the different types of circuits, you’ll better understand your home’s electricity, your electrician’s vocabulary, and even those annoying Christmas lights. A level physics study guide with questions and answers about accelerated motion, alternating current, as level physics, capacitance, charged particles, circular motion in physics, communication systems, electric current, potential difference and resistance, electric field, electromagnetic induction, electromagnetism and magnetic field. • Photodiode is a 2 lead semiconductor device that transforms light energy to electric current. Any time that you are given an electric circuit and asked for properties associated with that circuit (current, resistance, voltage, charge, capacitance) you will work the problem in one of two ways. This could account for voltage drops. When an _____compound is dissolved in water, the solution conducts electricity. Some of these studies have suggested the possibility that long-term, high cell phone use may be linked to certain types of brain cancer. Magnetic effect and electric current multiple choice questions and answers (MCQs), magnetic effect and electric current quiz answers pdf, learn online elementary school courses for science degree. The answer is given at the. The transfer of charge (i. Current Electricity 2. We use ohm's law to find relation between V, I and R. 250A flow in a circuit with 8. Single resistor voltage problems. – When the photodiode is expose to light, it acts a a current source, causing current flow. Positively charged ions (Na+, Ca++ , etc. If electrical problems are ongoing around your home, you should consider contacting a electrician. 1 The demand estimation is the starting point for planning the future electric power supply. Calculate the current an electric clothes dryer draws when it is connected to a 230 V source ands has a resistance of 9. Detailed solutions. Solution: Resistors in Parallel Consider a circuit with 3 resistors in parallel (such as the circuit below, if N = 3). NOW is the time to make today the first day of the rest of your life. Calculate the total energy dissipated by the radiator. Here we have given CBSE NCERT Exemplar Problems with Solutions for Class 12 Physics. These are the three basic building. 02 = 10-4 T Q. nuclear fission – the strong nuclear force holds nuclei together, although the energy released in nuclear fission comes from the electric force which drives the pieces apart. whether health problems can be linked to cell phone use. The manual is a comprehensive resource of all student text problems and solutions. Math Solution of Electric Current & Circuit. The source of current. Troubleshooting Your Way Through Electrical Problems Today's troubleshooters use many tools, from simple handheld meters that measure resistance and voltage to sophisticated recording oscilloscopes that capture fast transients. Network Theorems 3. Find the chapter notes of Electric Current based on the latest syllabus of JEE Main and JEE Advanced 2019. A force is exerted on the coil as a result of the interaction of magnetic field and electric current. Any time that you are given an electric circuit and asked for properties associated with that circuit (current, resistance, voltage, charge, capacitance) you will work the problem in one of two ways. The author is very much in favour of tutorials and the solving of problems as a method. cross-linked electric and magnetic fields propagate away from the current source. (i) Electric current can give rise to heating and lighting. The transfer of charge (i. Discover GE Lighting's range of smart, energy saving, LED and other light bulbs for every room in your home. At room temperature under the forward bias of 0. The charge may move in free space, through a conductor or on a conveyor belt. The large number of. FUNDAMENTALS OF ELECTRICITY There is a definite relationship between the three primary electrical characteristics: current, voltage and resistance. These Ohm's Law word problems will show you how to use the Ohm's Law to solve some basic and simple word problems. Problem 1-9: Power of a Current Source-A simple DC resistive circuit is solved by circuit reduction (for series and parallel resistors) and the power a current source calculated. As electric current is conducted through a material, any resistance (opposition to flow of electrons) results in a dissipation of energy, usually in the form of heat. Circuits make computers, digital cameras, and video games possible. Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism. -20 – 5I -5I – 12 – 10I = 0-32 – 20I = 0-32 = 20I. nuclear fission – the strong nuclear force holds nuclei together, although the energy released in nuclear fission comes from the electric force which drives the pieces apart. Grade 9 Science Unit 3: Electricity. In the 1830s, about ten years after Oersted discovered that an electric current produces magnetism, physicists observed the reverse effect— a moving magnetic field induces an electric current. • Photodiode is a 2 lead semiconductor device that transforms light energy to electric current. The main two effects of electric current is heating effect and magnetic effect. electric current by some aqueous solution. Electrical Power 14. The electric field of. CURRENT ELECTRICITY Multiple Choice Questions and Answers pdf,Interview Questions,mcqs,lab viva,seminar topics,online quiz important free download. Short circuit? Submit the adjacent form and receive multiple. • Suppose anode and cathode of a photodiode are wired to a current meter. When those same resistors are connected in parallel instead, we use a different formula for finding the equivalent resistance. The key word here is “continuous. ELECTRICITY - A Secondary Energy Source A Secondary Source The Science of Electricity How Electricity is Generated/Made The Transformer - Moving Electricity Measuring Electricity energy calculator links page recent statistics A SECONDARY SOURCE Electricity is the flow of electrical power or charge. While this is good, there is a much better way. Electricity & Magnetism Practice Problems. Learning to mathematically analyze circuits requires much study and practice. Electric current is an important physical quantity and its measurement is required in many applications, be it in industrial, automotive or household fields. I did not see and of this type of damage on inspection but obviously only some parts of wires are visible. Electric Forces, Fields & Potential - SparkNotes SAT Physics. This effect has many applications like Electric Heater, Light Bulb etc. Through there have been developments in science, and it all adds to the richness of human life. Even if the wire is straight and is not wound into a coil, there is still a magnetic field surrounding the electric current in the wire. The electric current is defined to be the rate at which charges flow across any cross-sectional. Electrical Power 14. Heating Effect of Electric Current. Solution Problem in this circuit is the combination of two cells. Current carries energy to the components of the circuit; that is why light bulbs you use at school light up. Physics 121 Practice Problem Solutions 03 Electric Field Contents: 121P03 -1Q, 4P, 6P, 8P, 13P, 21P, 23P, 39P • Recap & Definition of Electric Field • Electric Field Lines • Charges in External Electric Fields • Field due to a Point Charge • Field Lines for Superpositionsof Charges • Field of an Electric Dipole. Noise, however, is usually accompanied by vibration. Charge current is associated with the quantum motion of the charges. Electrical Concepts Electric field: force per charge [N C–1 = V m-1] Voltage: energy per charge [volt V = J C-1] Current: charges in motion [ampere A = C s-1] • requires charge [coulomb C] carriers Electrons: e-Holes: p+ • Conduction mechanisms Free electrons e- in metals Barrier gap/work function potential φ gap. Bordeaux-Montrieux. Some circuits require both ends grounded. Circuit (b) is a series circuit: each node is connected to exactly two components and the same current must ow through each. The Seven Types of Power Problems Schneider Electric - Data Center Science Center White Paper 18 Rev 1 3 How do we look at power? Electricity at the wall outlet is an electromagnetic phenomenon. What does an electric circuit mean? Solution: A continuous and closed path of an electric current is called an electric circuit. All students, freshers can download Electrical Engineering quiz questions with answers as PDF files and eBooks. Estimates show that 10 Arc-Flash incidents occur every day in the uS. Engineering Interview Questions and Answers, Engineering Multiple choice pdf for Freshers and experienced. Electric current flow through an electrolyte is by ionic migration. Electrical Tests and Evaluations The solution is to have a qualified electrician come out and make a few tests to identify the problem and get it repaired for you. Electricity. At room temperature under the forward bias of 0. Each Test consists of 10 to 15 multi choice questions. - must be so constructed and installed as to minimize electrical dangers to people in any workplace. Physics: Electric Current Problems? Answer at least one please, thanks 1) What is the emf of a battery with a 0. NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity in PDF form based on latest NCERT Books and option to study online. Lang Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology c 1998 Anant Agarwal and Jeffrey H. Unlock your Mastering Physics Solutions PDF (Profound Dynamic Fulfillment) today. and Canada. CURRENT TRANSFORMERS 101 publications give the burdens of individual relays, meters, etc. Direct Current (DC) Electrical Circuits. How well a solution conducts electricity depends on a number of factors: ’ Concentration • Mobility of ions • Valence of. Determine the current for such a computer. What is the potential difference across a hand-held fan that has a resistance of 120 Ω and a current of 50 mA. Ground could, in reality, be any voltage, but we subtract it out and call it 0V. When an _____compound is dissolved in water, the solution conducts electricity. What is the electric power consumed by the circuit? 1. What is the resistance of the wire that runs through the blanket?. Remember: Anytime you work with wiring, be sure to turn off the circuit at the main breaker panel. The current in the secondary coil always changes by the inverse of the ratio by which the voltage changes. Some of the chemical effects of electric current are as follows : Bubbles of. 1Electric energy in massive quantities is transmitted from this hydroelectric facility, the Srisailam power station located along the Krishna River in India, by the movement of charge—that is, by electric current. 10 What is electrolysis ? Ans: Electrolysis is the breaking up of a compound from its solution on passing electric current through the. DANGERS OF STATIC ELECTRICITY AND PROTECTION IN AVIATION DjovčošMartin Abstract: This paper deals withthe danger situations caused bystatic electricityand offers some basic informationonits originindifferent environment. These are the three basic building. If the circuit components are connected end to end to form a single loop it is a series-circuit. DRO VOLTA'S discovery, in 1793, that electricity could be produced by placing two dissimilar metals on opposite sides of a moistened paper. Solution in an electric cell. It flows from a power source like a battery or power station. Dynamic Model Figure 2b shows an equivalent scheme of the separately-excited DC motor. Animation: Water as an Analogy for Electric Current. It uses a mild electric current to treat your overactive bladder (OAB) and ease your strong urge to pee. Practice more on Electric Current and its Effects. Current is the flow of an electric charge. So as in several hoses. carry any continuous flowing electric current. Then, calculate the total current. To avoid tedium, most integrals needed for problem solution are supplied as hints. These interventions have included modifying existing equipment, making changes in work practices and purchasing new tools or other devices to assist in the production process. What current flows in a circuit with a potential difference of 12. The flow of electric current flow is from higher electric potential to lower electric potential. P = VI I = P/V = 100/240 =0. Electrical Machines Book title Electric Machinery Fundamentals; Author. I would say that the most important discovery for current besides positive and negative, was when Alessandro Volta made the electric pile (a battery) therefore generating the first constant direct current in 1800. There are, however, other types of conductors like electrolytic solutions where positive and negative charges both can. reverses d. Current is related to resistance (R) and voltage (V) by the formula $ V=IR $ and to power (P) by $ P=IV $ Current divided by. Electric Machinery Fundamentals 4th Edition Solution Manual - Chapman. These charges can be at rest or moving. Superposition Find the current using superposition. Answers to selected problems are listed at the back of this book. Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. Shed the societal and cultural narratives holding you back and let free step-by-step Mastering Physics Solutions textbook solutions reorient your old paradigms. Electrical current flows from a region of high charge or potential to a region of low potential. Parts of the book are based on the author's previous work Electrical Engineering Problems with Solutions which was published in 1954. Electrical current 3. Suppose that the material to be used in a fuse melts when the current density rises to 440 A/cm 2. A path that an electric current follows is a circuit. Global warming has become an undisputed fact about our current livelihoods; our planet is warming up and we are definitely part of the problem. Most household electrical appliances convert electrical energy into heat by this means. Function of Brushes : The two fixed brushes B 1 and B 2 , which are made of soft conducting material such as carbon, are in contact separately with the outer surface of rotating rings R 1 and R 2 , respectively. Solution to Problem 10: Let E p1 be the potential electric energy at rest (distance r = 3μm) and E p2 be the potential electric energy when they are 5μm apart and moving. While this is good, there is a much better way. Only you can prevent house fires — or at least greatly lower the risk by keeping an eye out for these warning signs of trouble.  No Brain Too Small ⚫ PHYSICS  Resistors in a DC circuit (2014;2) Sandra is investigating electrical circuits in the lab. The proportionality constant between δV and I is called the resistance, R. MCQs preparation for Engineering Competitive Exams Civil Engineering Interview Questions, Mechanical Engineering Interview Questions, Electrical Engineering Interview Questions, Online preparation tests for Engineering Students. We have adapted electricity in our lives so much that it becomes impossible to imagine life without it. Free PDF download of NCERT Solutions for Class 10 Science (Physics) Chapter 13 - Magnetic Effects of Electric Current solved by Expert Teachers as per NCERT (CBSE) Book guidelines. Energy is the ability to cause change. Q3 Calculate the potential energy of an electron at a point where the electric potential is 6. We provide step by step Solutions for ICSE Physics Class 10 Solutions Pdf. The ampere is used to measure electricity. 5 V battery. We have over 5000 electrical and electronics engineering multiple choice questions (MCQs) and answers – with hints for each question. The first step to troubleshooting one, whether it's an outage, flickering lights or power surge, is to ask. It is the heating effect of current due to resistance of wire that flow of current. Grade 9 Science Unit 3: Electricity. Lab Preparation Electric charges move through electrical conductors in response to a potential difference or voltage. the amount of charge passing a given point in a circuit each second. electric circuit every 0. Choose your answers to the questions and click 'Next' to see the next set of questions. The SI unit of electric current is the ampere (A). Foundations of Analog and Digital Electronic Circuits Solutions to Exercises and Problems Anant Agarwal and Jeffrey H. A long cylinder with uniformly charged surface and cross-sectional radius a = 1. Electron moves P1 → P2 ′. solved-problems. - Gross section of a typical storage battery. gearcase does not have to be removed on these. Revision Questions for Electricity (See also Mains Electricity). If the voltage is doubled, the current is halved. Principles of Electric Circuits: Conventional Current Version, 9th Edition w/solutions to chapter problems, solutions to both lab manuals) for Principles of. In DC, the. Be careful not to lose sight of your goal among all the bits and pieces, however. NET have the following Chapter 20 Study Guide Static Electricity Answers Free Physics Ebooks Pdf, 24 Study Guide Answers Chapter 24, Chapter 24 Study. Electrical Engineering Questions with Answers pdf :-1. What is the electric power consumed by the circuit? 1. Volume 8—Sensing Solutions CA08100010E—September 2017 www. After each of the electrical problems I give an explanation or a resource from this or another website. 38 ohm internal resistance if the battery delivers 2. Conductors, insulators and electric current Conductors are materials in which a significant number of charged particles are free to move. Free PDF download of NCERT Solutions for Class 12 Physics Chapter 3 - Current Electricity solved by Expert Teachers as per NCERT (CBSE) textbook guidelines. The first is exceeding the absolute maximum current ratings of the traces and components on a PCB. A path through which electric current flows. A electric toaster of resistance 20 Ohm takes a current of 5A. Complete solutions to these. The magnetic field produced by an electric current forms circles around the electric current, as shown in the diagram below: If a wire carrying an electric current is formed into a series of loops, the magnetic field can be concentrated within the loops. Topic 5 - Electric Current Problems. The answer is given at the end of each problem, however, for convenience. Stuck on a electric circuits question that's not in your textbook? Chegg's electric circuits experts can provide answers and solutions to virtually any electric. Studies of the electrical conductivity of solutions, and other properties of solutions such as freezing point depression and osmotic pressure, showed an interesting dichotomy. experience problems when harmonics become a significant component of the overall load. applications such as fixed electric deicing and snow melting equipment, as well as fixed electric heating equipment for pipelines and vessels, in accordance with Articles 426 and 427 in the NEC. The direction of any electric current is the direction of flow of positive charge (conventional current). • Thus the direction of the current was considered the. 1Electric energy in massive quantities is transmitted from this hydroelectric facility, the Srisailam power station located along the Krishna River in India, by the movement of charge—that is, by electric current. Different technical solutions to measure currents are known and are found on the market. How well a solution conducts electricity depends on a number of factors: ’ Concentration • Mobility of ions • Valence of. (See previous solution. I'm not sure about the full load current calculation as well. Current Electricity 2. The entire NCERT textbook questions have been solved by best teachers for you. 2 Electric Current and Ohm’s Law This section discusses electric current a circuit that has a resistance of 3. Solutions to Practice Problems (PP) 4. 5 V battery. INSTRUCTOR'S SOLUTION MANUAL. 1 Electric Current Electric currents are flows of electric charge. About this quiz: All the questions on this quiz are based on information that can be found at Physics: Electric Current. Learn and practice from Magnetic Effect of Electric Current quiz, study notes and study tips to help you in NEET Physics preparation. Solution: Power,P = 100W and Voltage,V = 200V. It uses a mild electric current to treat your overactive bladder (OAB) and ease your strong urge to pee. Animation: Water as an Analogy for Electric Current. Introduction of Electrochemical Concepts • Electrochemistry - concerned with the interrelation of electrical and chemical effects. Spectral problems related to a time dependent model in superconductivity with electric current. We have the circuit on the right, with a driving voltage US = 5 V, and we want to know U and I. Hel er (Univ Paris-Sud and CNRS) with numerical simulations of W. 1 for all the necessary equations. This direction is not necessarily the same as the direction in which charged particles are actually moving. Figure 1 Effects of Electrical Current On the Human Body Current is the killing factor in electrical shock. This is one science lesson you don't want to miss!. FUNDAMENTALS OF ELECTRICITY There is a definite relationship between the three primary electrical characteristics: current, voltage and resistance. shm asap drawing shm unit 10 worksheets (field forces - circular motion) on. The Book 2. Below is the difference between AC and DC current. generator 6. 250 Megawatts 12. The current in the circuit is 2 amperes when the resistance in the circuit is adjusted to 10 ohms. For other answers please visit to Page 200 or Page 202 or Page 209 or Page 213 or Page 216 or Page 218 or Exercises or go for हिंदी मीडियम Solutions. The main difference between static and current electricity is that the term static electricity refers to situations where there is an excess of charges in a region without there being a net flow of charge, whereas current electricity refers to cases where there is a net flow of charge in response to a potential difference. It dissipates a power of 82 W. While direct current (DC) electricity flows in one direction through a wire, AC electricity alternates its direction in a back-and-forth motion. AP* Electric Circuits Free Response Questions KEY For indicating that the wavelength or speed is less underwater: Combining this with the equation gives a compressed pattern ii. Electric Current and Circuits: Example Problems with. – When photodiode is placed in dark, the current meter displays zero current flow. The net drift velocity vdis ~10-4 m/s. A current causes energy to be dissipated in the wire, warming the blanket. CLICK HERE —-> EEE INTERVIEW QUESTIONS. The pressure coil(PC) and current coil(CC) of a wattmeter are connected to the load as shown,with the coil polarities suitably selected to ensure a positive deflection. • Consider that the Rodents in the attic space may have chewed on wires. The air being moved by it can be felt. PROBLEM #4 The amount of charge that passes through the filament of a certain light bulb in 2 seconds is 12C. Download for free (or view) PDF file Physics Current Electricity MCQ for Competitive Exams. What is the resistivity of the wire? (b) The resistance of a bagel toaster is 12. The maximum current that can be measured. So as in several hoses. Just like water flow in a pipe: How much water passes a point each second is defined as current also. Explain why is it that the electrons cannot travel faster in the conductor? b. Download pdf je electrical questions answers in hindi. New construction methods and materials are causing real problems - elimination of a structural element that has a secondary benefit as an electrical conductor is causing electrical problems. Simplified cross-section schematic (a) and equivalent scheme of separately-excited DC motor. Below are the list of all Electrical Engineering Multiple Choice Questions and Answers for EEE students. An overload occurs when you draw more electricity than a circuit can safely handle. Very useful for introductory calculus-based and algebra-based college physics and AP high school physics. AP1 Electricity Page 7 7. Full load Current in Amperes (Alternating Current AC Motors) Alternating Current AC (Single-φ & 3-φ) Finding Motor Hp ( Horse Power), kVA (kilo-Volt Ampere) kW input, When Motor HP is known. Answers to selected problems are listed at the back of this book. 1 Megawatt d. The circle next to the answer will turn yellow. case they split into independent problems for electric and magnetic fields. Answers to these pages are included in the Teacher Guide and Answers section at the back of this book. Concepts of Physics Part 2, Numerical Problems with their solutions, Short Answer Solutions for Chapter 32 - Electric Current In Conductors from the latest edition of HC Verma Book. There are two types of current, direct current (DC) and alternating current (AC). (credit: Chintohere, Wikimedia Commons). • Thus the direction of the current was considered the. Electricity flows in two ways: either in an alternating current (AC) or in a direct current (DC). electronicsbookcafe. Electron moves P1 → P2 ′. Principles of Electric Circuits: Conventional Current Version, 9th Edition w/solutions to chapter problems, solutions to both lab manuals) for Principles of. Fundamentals of electric circuits sadiku 5th edition solution manual. The electric field of. Electron flow through water cannot occur. No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. Topics and Subtopics in NCERT Solutions for Class 12 Physics Chapter 3 Current Electricity:. This lecture note explains the following topics: Electric Charge and Force, Electric Field and Simple Distributions of Charge, Complex Distributions of Electric Charge, The Motion of Electric Charge, Potential and the Storage of Energy, Capacitors, Electric Current, Resistance to Electric Current, Magnetic Force, Magnetic Force between Currents, Magnetic. gearcase does not have to be removed on these. 534 Series and Parallel Circuits F. o All magnets have two ends called poles. The \(\displaystyle IR\) drop across a resistor means that there is a change in potential or voltage across the resistor. This means that anyone working with electricity in a damp or wet environment needs to exercise extra caution to prevent electrical hazards. Used in cell phone, flashlights etc. Solution In an electromagnetic wave, when E is parallel to öj and B to , S is parallel to E !B or öj ! = "kö. Each electron has an electric charge of -1.