Resistance and Power
One thousand watts of electric power are transmitted to a device by means of a series of two wires, each of which has a resistance of If the resulting potential difference across the device is 100V, then what is the potential difference across the source supplying the power?
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1 solution
P=VI.
I = (P/V) = (1000/100) = 10 A
IR drop = IR = 20V
100 + 20 + 20 = 140 V