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JEE Main201912 Jan 2019Evening ShiftPhysicsCurrent ElectricityActual

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 = 4 s ?

Options

  1. A1.5 μ A
  2. B2 μ A
  3. CZero
  4. D3 μ A

Correct answer

C. Zero

Step-by-step solution

As we know that the d q d t 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 d q d t is zero Since d q d t t = 4 s = 0 Therefore current = 0

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