Current Electricity

JEE Main level, single correct, medium

32 of 380

Question 32 of 380

The charge on a capacitor plate in a circuit, as a function of time, is shown in the figure:



What is the value of current at t=4s?t=4s?

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Answer: (C) Zero

As we know that the dqdt\dfrac{dq}{dt} at any point t gives as current at that point
and in this case the curve is constant at the point of 4 so that dqdt\dfrac{dq}{dt} is zero
Since dqdt∣t=4s=0{\left.\dfrac{dq}{dt}\right|}_{t=4s}=0

Therefore current =0=0

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