(a) Name a device which helps to maintain potential difference across a conductor (say, a bulb).
(b) If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?

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Solution

(a) A battery or cell helps to maintain potential difference across a conductor.

(b) 1 minute = 60 seconds

E = VIt = $10 \times 2 \times 60 = 1200 J$

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(a) Name a device which helps to maintain potential difference across a conductor (say, a bulb). (b) If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?

(a) A battery or cell helps to maintain potential difference across a conductor. (b) 1 minute = 60 seconds E = VIt = 10×2×60=1200 J

(a) Name a device which helps to maintain potential difference across a conductor (say, a bulb).
(b) If a potential difference of 10 V causes a current of 2 A to flow for 1 minute, how much energy is transferred?

(a) A battery or cell helps to maintain potential difference across a conductor.

(b) 1 minute = 60 seconds

E = VIt = $10 \times 2 \times 60 = 1200 J$