A source of e.m.f. E = 15 V and having negligible internal resistance is connected to a variable resistance so that the current in the circuit increases with time as i = 1.2t+3. Then, the total charge that will flow in first five seconds will be

Question:

Options :

a) 10 C
b) 20 C
c)30 C
d)40 C

Answer :

c)30 C

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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