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Ohm’s Law Quiz 1. _____ is a difference in electric potential energy. 2. True or false: A source of voltage is required for an electric current to flow. 3. The opposition of matter to the flow of electric current is called _____. 4. The amount of current flowing through a wire will be less when there is greater a) voltage. b) resistance. c) electric potential energy. d) two of the above 5. Which equation represents Ohm’s law? a) Current = Voltage x Resistance b) Current = Voltage/Resistance c) Current = Resistance/Voltage d) none of the above 6. The SI unit for electric current is the _____. 7. Explain Ohm’s law by comparing current flowing through a wire to water flowing through a hose. 8. True or false: Ohm’s law can be used to calculate current when voltage and resistance are known. 1 9. Assume that an electric wire is connected to a 9-volt battery and the wire has a resistance of 3 ohms. How much current is flowing through the wire? a) 27 amps b) 12 amps c) 9 amps d) 3 amps 10. A wire with 3 ohms of resistance is connected to a battery. If 4 amps of current are flowing through the wire, what is the voltage of the battery? 2