Q10 of 330 Page 18

A resistance of 20 ohms has a current of 2 amperes flowing in it. What potential difference is there between its ends?

As we know that

V = IR


V = 2A × 20 ohms = 40 V


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8

Keeping the potential difference constant, the resistance of a circuit is halved. By how much does the current change?

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A potential difference of 20 volts is applied across the ends of a resistance of 5 ohms. What current will flow in the resistance?

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A current of 5 amperes flows through a wire whose ends are at a potential difference of 3 volts. Calculate the resistance of the wire.

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Fill in the following blank with a suitable word :

Ohm's law states a relation between potential difference and ........................