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 t = 4 s ?
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 ?
What is the value of current at t = 4 s ?
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Current is the rate of flow of charge: \(I=\frac{dq}{dt}\) = slope of the q-t graph.
Updated On: Nov 5, 2026
- zero
- \(1.5\ \mu\mathrm{A}\)
- \(2\ \mu\mathrm{A}\)
- \(3\ \mu\mathrm{A}\)
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The Correct Option is A
Solution and Explanation
\(I=\frac{dq}{dt}\) equals the slope of the q-t graph.
Between t = 2 s and t = 6 s the graph is horizontal at \(q=3\ \mu\)C, so the slope is zero.
At t = 4 s the current is zero.
Answer: (1) zero
Between t = 2 s and t = 6 s the graph is horizontal at \(q=3\ \mu\)C, so the slope is zero.
At t = 4 s the current is zero.
Answer: (1) zero
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