1) A voltage of 5V is applied to a 1Ω resistor. What current would you expect to flow? a) 200A b) 0.5A c) 5000A d) 5A 2) A current of 5A flows through a coil of wire when the voltage across it is 230V What is its resistance a) 460Ω b) 46Ω c) 1150Ω d) 115Ω 3) What voltage is needed to pass a current of 0.1A through a 10Ω resistor? a) .01V b) 0.0001V c) 1V d) 100kV 4) A lamp has a current of 1.5A flowing through it when the voltage across it is 6V. What is the resistance of the lamp at this voltage? a) 9Ω b) 4Ω c) 6Ω d) 90Ω 5) What is the unit of resistance? a) Ampere b) Ohm c) Volt d) Watt 6) What causes resistance? a) electrons repelling each other b) electrons being absorbed by ions c) electrons colliding with ions d) electrons colliding with other electrons 7) What formula do you need to calculate resistance? a) resistance = voltage / current b) resistance = current / voltage c) resistance = voltage x current d) resistance = voltage x power 8) Which of these does not affect the resistance of a wire? a) color b) length c) thickness d) material 9) What is the unit of current? a) Amps b) Ohms c) Volts 10) What is the unit for voltage? a) Amps b) Ohms c) Volts

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