6. This question is about using electricity. This simple circuit can be used to light a bulb.
(a) The current from a battery is direct current. The current from the mains supply is alternating current. Use your ideas about electron movement to explain the difference between direct current and alternating current. [2] (b) The voltage of the battery is 12 V. The current through the bulb is 0.5 A. Calculate the power transferred to the bulb. You must show how you work out your answer, including any equation used. power = .......... unit = .......... [4] (c) The circuit is switched on. Calculate the charge which flows through the bulb in 5 minutes. You must show how you work out your answer, including any equation used. charge = .......... unit = .......... [4] [Total: 10] Hints and Answers coming soon!
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