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A source of e.m.f. E = 15V and having ne...

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

A

10 C

B

20 C

C

30 C

D

40 C

Text Solution

Verified by Experts

The correct Answer is:
C
`E = 15 V, i = 1.2t + 3`
`q = int_(0)^(5)idt =int_(0)^(5) (1.2 t + 3) dt`
`(1.2 xx 25)/2 + 15 = 30 C`
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