A source of emf E=10V and having negligible internal resistance is connected to a variable resistance. The resistance varies as shown in figure. The total charge that has passed through the resistor R during the time interval from t1 to t2 is
A
40loge4
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B
30loge3
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C
20loge2
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D
10loge2
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Solution
The correct option is D10loge2 Let R=at+b
At t=10s,R=20Ω