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1 January, 21:16

A car radio draws 0.18 A of current in the autos 12-V electrical system. (a) How much electric power does the radio use?

(b) What is the effective resistance of the radio?

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  1. 1 January, 21:20
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    a) Electric Power = V X I, where V is potential difference and I is current

    = 12 x. 18 = 2.16 Watt.

    b) Resistance = volt / current (ohm's Law)

    Resistance = 12/0.18 = 66.67 ohm.
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