Problem 1RCQ: Which part of an atom is positively charged, and which part is negatively charged? Problem 2RCQ: What is meant by saying that charge is conserved? Problem 3RCQ: How is Coulombs law similar to Newtons law of gravity? How is it different? Problem 4RCQ: How does a coulomb of charge compare with the charge of a single electron? Problem 5RCQ: Give two examples of common force fields. Problem 6RCQ: How is the direction of an electric field defined? Problem 7RCQ: In terms of the units that measure them, distinguish between electric potential energy and electric... Problem 8RCQ: A balloon may easily be charged to several thousand volts. Does that mean it has several thousand... Problem 9RCQ: What is the difference between a conductor and an insulator? Between a conductor and a... Problem 10RCQ: What kinds of material are the best conductors? Why are they so good at conducting electricity? Problem 11RCQ: What condition is necessary for heat energy to flow from one end of a metal bar to another? For... Problem 12RCQ: What condition is necessary for a sustained flow of electric charge through a conducting medium? Problem 13RCQ: Why do electrons, rather than protons, make up the flow of charge in a metal wire? Problem 14RCQ: Distinguish between DC and AC. Problem 15RCQ: Which has more resistancea thick wire or a thin wire of the same length? A short wire or a long... Problem 16RCQ: What is the unit of electrical resistance? Problem 17RCQ: What is the effect on the current through a circuit of steady resistance when the voltage is... Problem 18RCQ: How much current does a radio speaker with a resistance of 8 draw when 12V is impressed across it? Problem 19RCQ: Which type of circuit is favored for operating several electrical devices, each independently of the... Problem 20RCQ: How does the sum of the currents through the branches of a simple parallel circuit compare with the... Problem 21RCQ: What is the relationship among electric power, current, and voltage? Problem 22RCQ: Considering a kilowatt and a kilowatt-hour, which is a unit of energy and which is a unit of power? Problem 23RCQ Problem 24RCQ Problem 25RCQ Problem 26RCQ: Why is iron magnetic and wood is not? Problem 27RCQ Problem 28RCQ: What is a galvanometer? What is it called when it is calibrated to read current? To read voltage? Problem 29RCQ: What are the three ways in which voltage can be induced in a wire? Problem 30RCQ: a What is induced by the rapid alternation of a magnetic field? b What is induced by the rapid... Problem 31TIS: High voltage by itself does not produce electric shock. What does? Problem 32TIS: What is the source of the electrons that shock you when you touch a charged conductor? Problem 33TIS: If a current of 0.1 or 0.2 of an ampere were to flow into one of your hands and out the other, you... Problem 34TIS: What effect does high temperature have on a common magnet? Problem 35TIS: Electric charges at rest produce an electric field. What additional field is produced by an... Problem 36TIS: People have wondered about the "mystery" of animal migration for generations. Give one possible,... Problem 37TIS: What is the likely cause of Earths magnetic field? Problem 45PC: Two point charges, each with 0.1C of charge, are 0.1m apart. Given that k is 9109Nm2/C2 the... Problem 46PC: A toaster has a heating element of 15 and is connected to a 120-V outlet. Show that the current... Problem 47PC: When you touch your fingers resistance 1000 to the terminals of a 6-V battery, show that the small... Problem 48PC: Calculate the current in the 240 filament of a bulb connected to a 120-V line. Problem 49PC: An electric toy draws 0.5A from a 120-V outlet. Show that the toy consumes 60W of power. Problem 50PC: Show that the power consumed by a 120-V device that draws 5A of current is 600W. Problem 51TC: The three pairs of same-size metal spheres have different charges on their surfaces as indicated.... Problem 52TC: Rank circuits A, B, and C according to the brightness of the identical bulbs, from brightest to... Problem 53TC: The bulbs in parallel circuits A, B, and C are identical. An ammeter is placed in different... Problem 54TC: Bar magnets are moved into the wire coils in identical quick fashion. Voltage induced in each coil... Problem 55TS: Two point charges are separated by 6cm. The attractice force between them is 20N. Show that the... Problem 56TS: A droplet of ink in an industrial ink-jet printer carries a charge of 1.61010C and is deflected onto... Problem 57TS: Find the voltage change a when an electric field does 12J of work on a charge of 0.0001C and b when... Problem 58TS: Rearrange this equation Current=voltageresistance to express resistance in terms of current and... Problem 59TS: Use the formula Power=currentvoltage to find that the current drawn by a 1200-W hair dryer connected... Problem 60TS: Show that it costs 3.36 to operate a 100-W lamp continuously for a week if the power utility rate is... Problem 61TS: An electric iron connected to 120V draws 9A of current. Show that the amount of heat generated in... Problem 62TE: When combing your hair, you scuff electrons from your hair onto the comb. Is your hair then... Problem 63TE: The 5000 billion billion freely moving electrons in a penny repel one another. Why dont they fly out... Problem 64TE: What is meant by saying that charge is conserved? Problem 65TE: Two equal charges exert equal forces on each other. What if one charge has twice the magnitude of... Problem 66TE: How does the strength of electric force between a pair of charged particles compare when the... Problem 67TE: In what way does an electrically polarized object differ from an electrically charged object? Problem 68TE: A particle having a charge qcoulombs experiences a force F in newtons in a particular electric field... Problem 69TE: Suppose that the strength of the electric field around an isolated point charge has a certain value... Problem 70TE: What is the term given to the electric potential energy of a charged object divided by the charge? Problem 71TE: Why might the wingspans of birds be a consideration in determining the spacing between parallel... Problem 72TE: Why is a good conductor of electricity also a good conductor of heat? Problem 73TE: A garden hose waters a garden. Water in a car engine cools the engine. Which of these two is... Problem 74TE: A hydraulic pump doesnt produce water but, instead, moves it. How is this analogous to an electric... Problem 75TE: Lillian is charged to some 50,000V but is unharmed. Her hair, however, stands out. Why is she not... Problem 76TE: Batteries and generators produce electric current. Which produces DC and which produces AC? Problem 77TE: Which travels at nearly the speed of light in an electrical circuit: electrons, electric field, or... Problem 78TE: Which flows through an electric circuit: voltage, electric charge, resistance, or all three? Problem 79TE: Comment on the warning sign in the sketch. Problem 80TE: Which has the greater electric resistance: a wire having no current or the same wire carrying... Problem 81TE: What is the effect on the current in a wire if the voltage is doubled and the resistance is halved?... Problem 82TE: Why can a bird safely perch on an un insulated high-voltage wire? Problem 83TE: If a bird perched on a high-voltage wire reaches over with its foot and touches another wire, why is... Problem 84TE: Will the current in a light bulb connected to a 220-V source be greater or less than the current in... Problem 85TE: In Figure 7.24, Will uses four batteries to light a single bulb, which glows. If he connected the... Problem 86TE: In Figure 7.25, author Paul lights three identical bulbs connected between brass rods that connect... Problem 87TE: As more and more bulbs are connected in a series to a flashlight battery, what happens to the... Problem 88TE: In the circuit shown, how does the brightness of each individual bulb compare? Which light bulb... Problem 89TE: What unit of measurement is meant by a joule per coulomb, b coulomb per second, and c watt-second? Problem 90TE: What happens to the brightness in a lamp of any kind when the current in it increases? Problem 91TE: Why are LED bulbs more efficient than incandescent bulbs? Which type is more preferred when placed... Problem 92TE: Electric charge may be positive or negative but not both at the same time. Can a magnet have only... Problem 93TE: Surrounding any mass is a gravitational field. Surrounding any electric charge is an electric field.... Problem 94TE: In what sense is motion relevant to a magnetic field? Problem 95TE: Since every iron atom is a tiny magnet, why aren't all things made of Iron also magnets? Problem 96TE: In what relative direction between a magnetic field and a current-carrying wire is the force on the... Problem 97TE Problem 98TE: Is it correct to say that an electric motor is a simple extension of the physics that underlies a... Problem 99TE: In what way did Maxwell add to the physics of electromagnetic induction? Problem 100TE: How does electromagnetic induction lead to the nature of light? Problem 101TDI: When a car is moved into a painting chamber, a mist of paint is sprayed around it. When the body of... Problem 102TDI: You are not harmed by contact with a charged Van de Graaff generator, even though its voltage may be... Problem 103TDI: Discuss the circuits shown. In which of these circuits does a current exist to light the bulb? Problem 104TDI: Sometimes you hear someone say that a particular appliance uses up electricity. What is it that the... Problem 105TDI: Are automobile headlights wired in parallel or in series? What is your evidence? Problem 106TDI: Your tutor tells you that an ampere and a volt measure the same thing and that the different terms... Problem 107TDI: The circuit shown in an incandescent flashlight bulb still used in some labs is shown at the left... Problem 108TDI: A person in your discussion group says that changing electric and magnetic fields generate each... Problem 109TDI: Another person in your discussion group says that a battery provides not a source of electron, but a... Problem 110TDI: Still another person in your discussion group says that adding bulb in series to a circuit provides... Problem 111TDI: Can an electron at rest in a magnetic field be set into motion by the magnetic field? What if it... Problem 112TDI: A magician places an aluminum ring on a table, underneath which is hidden an electromagnet. When the... Problem 1RAT: An electron and a proton a attract each other. b repel each other. c attract or repel depending on... Problem 2RAT: When a pair of charged particles are brought twice as close to each other, the force between them... Problem 3RAT: Surrounding every moving electron is a an electric field. b a magnetic field. c both. d neither. Problem 4RAT: When you double the voltage in a simple electric circuit, you double a the current. b the... Problem 5RAT: In a simple circuit consisting of a single lamp and a single battery, when the current in the lamp... Problem 6RAT: In a circuit with two lamps in parallel if the current in one lamp is 2 A, the current in the... Problem 7RAT: If both current and the voltage in a circuit are doubled, the power a remains unchanged as... Problem 8RAT: The essential physics concept in an electric generator is a Coulombs law. b Ohms law.. c Faradays... Problem 9RAT Problem 10RAT: The mutual induction of electric and magnetic field can induce a Light. b sound. c Both light and... format_list_bulleted