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प्रश्न
The p.d. across a lamp is 12 V. How many joules of electrical energy are changed into heat and light when:
a charge of 1 C passes through it?
उत्तर
Amount of energy = Work done
Using the formula, V = W / Q, we have,
W = V x Q
= 12 x 1
= 12 J.
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