# Q. 4.     Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be –             (a) 1:2             (b) 2:1             (c) 1:4             (d) 4:1

If resistors are connected in parallel, the net resistance is given as

If resistors are connected in series, the net resistance is given as

Heat produced = H =

Thus, option C is correct.

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