Revision: Current Electricity 15 Current Electricity - Revision Quiz Test your understanding of Current Electricity here: 1 / 5 1) A metal wire of length l and diameter d has a resistance of 10 Ω. If another wire of the same material is 0.5l in length and 0.5d in diameter, what is its resistance? 20 Ω 5 Ω 40 Ω 80 Ω 2 / 5 2) What is the voltmeter reading in the circuit below, given that the ammeter reads 2.0 A? 22 V 20 V 18 V 2 V 3 / 5 3) The current in a small torch bulb is 0.40 A. What is the total electric charge which passes a point in the circuit in 5 minutes? 740 C 2 C 120 C 12.5 C 4 / 5 4) What are the correct units for electric current and charge? Current: Volts Charge: Amperes Current: Coulombs Charge: Amperes Current: Amperes Charge: Coulomb Current: Volts Charge: Coulombs 5 / 5 5) What is an electromotive force? It is the work done by a voltage source to drive a unit charge through a component. It is the work done by a voltage source in driving a unit charge around a circuit. It is the work done by an appliance in driving a unit charge around a circuit. It is the product of current through a component and the resistance of the component. Your score is Restart quiz