Two wires A and B of same material and mass have their lengths in the ratio 1: 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5W. The rate of heat dissipation in A is

Question:

Options :

a)10W
b)5W
c)20W
d) None of these

Answer :

c)20W

Answer Steps :

Step:-1

Step:-2

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Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be

If a body is executing simple harmonic motion then

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