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Chapter 20 Review activity! Fun in B208! 1 What is a coulomb? A. Unit of energy B. Unit of charge C. Unit of current D. Unit of voltage. 2 The motion of charges in wires is best called electric: A. current. B. voltage. C. power D. conductance 3 An ohm is the unit of measurement for: A. current. B. voltage. C. power D. resistance. 4 An amp is the unit of measurement for: A. current. B. voltage. C. power D. resistance. 5 An open circuit: A. is on B. is off C. is left behind D. is Ohm’s Law 6 The term current refers to: A. a store at the mall. B. potential difference. C. flowing charges. D. resistance. 7 The term voltage refers to: A. a store at the mall. B. potential energy. C. flowing charges. D. resistance. 8 The term resistance refers to: A. a store at the mall. B. potential energy. C. flowing charges. D. resisting the flow of current. 9 Electrical current will not pass easily through: A. an absorber. B. a conductor. C. a semiabsorber. D. an insulator. 10 An object with equal positive and negative charge is? A. positively charged B. negatively charged C. neutral D. none of the above 11 If voltage increases, what happens to current? A. It increases B. It decreases C. It stays the same D. There is no current 12 If resistance increases, what happens to current? A. It increases B. It decreases C. It stays the same D. There is no current 13 What is Ohm’s Law? A. I = V/R B. V=IR C. R=V/I D. all of these 14 If 8.0 amperes of current flows with a voltage of 120 volts what is the resistance? A. 10 W B. 15 W C. 0.067 W D. 960 W I = V/R 15 In the circuit below, 8 amperes of current passes through the light bulb. The resistance of the light bulb is 2 ohms. What is the voltage of the battery? 16 A. 16 Volts B. 4 Volts C. 32 Volts D. None of these A light is plugged into a 120-volt outlet. If it has a resistance of 360 ohms, how much current does it use? 17 A. 3 amps B. 42300 amps C. 0.33 amps D. None of these Switches 2 and 3 are open, and all others are closed. What devices are on? ABCDEFG Switches 4 and 6 are open, and all others are closed. What devices are on? ABCDEFG