Revision: Current Electricity 15 Current Electricity - Revision Quiz Test your understanding of Current Electricity here: 1 / 5 1) Wire E has a resistance of 10 Ω. Wire F, made of the same material, is twice the length but has half the cross sectional area of wire E. What is the resistance of wire F? 40 Ω 2.5 Ω 5.0 Ω 20 Ω 2 / 5 2) The following graph shows the relationship between current passing through a component and voltage across the component. How is the resistance determined when the current passing through the component is 10 A? 10 / 8 8 / 10 (8-3) / 10 10 / (8-3) 3 / 5 3) What is the effective resistance of the four resistors in the circuit shown below? 33 Ω 8.2 Ω 8.0 Ω 1.5 Ω 4 / 5 4) What is the voltmeter reading in the circuit below if the ammeter is showing 2.0 A? 2 V 0 V 20 V 5 V The voltmeter is connected across an ammeter (that has zero resistance) thus it will read 0 V. 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 product of current through a component and the resistance of the component. It is the work done by an appliance in driving a unit charge around a circuit. It is the work done by a voltage source in driving a unit charge around a circuit. Your score is Restart quiz