Question:
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 $\mathrm{t}=4 \mathrm{~s}$ ?
Correct Option: 1
Solution:
(1) Clearly, from graph
Current, I $=\frac{\mathrm{dq}}{\mathrm{dt}}=0$ at $\mathrm{t}=4 \mathrm{~s}$ [Since $\mathrm{q}$ is constant]
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