Two conducting wires of the same material and of equal lengths and equal diameters are first connected in parallel and then in series in a circuit across the same potential difference. The ratio of heat produced in parallel and series combinations is
4:1
Correct Answer: (b) 4:1
Explanation: The heat produced is inversely proportional to the resistance. In parallel, the total resistance decreases, and in series, it increases. Hence, heat produced in parallel is four times that in series.
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The work done in moving a charge of 2 coulomb (C) from point A to point B is 24 J. What is the potential difference between A and B?
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in parallel and then in series in a circuit across the same potential difference. The ratio of heat produced in parallel and series combinations is
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