Complete the sentences: 1. Electricity is the ... a. a measure of the energy carried by the charge; b. flow of charge around a circuit carrying energy from the battery to component; c. single conductor which may have insulation (usually plastic). 2. Electric current can flow only if a ... a. circuit is complete; 1 b. circuit is broken; c. switch is open. 3. Electric current cannot flow and the lamp is off ... a. when switch is closed; b. when there is no connection: c. when switch is open the circuit is broken. 4. The components of the circuit are ... a. a battery, wires, a switch and a lamp: b. many fine strands of wire; c. several colour-coded cores. 5. "Open circuit" is ... a. a connection with very low resistance such as a wire; b. a wrong connection; c. a break in some part of a circuit or a fault.
1 - b
2 - a
3 - c
4 - a
5 - c
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