Question:

Identify the valid statements relevant to the given circuit at the instant when the key is closed.
 


A \text{A} : There will be no current through resistor R.
B \text{B} : There will be maximum current in the connecting wires.
C \text{C} : Potential difference between the capacitor plates A and B is minimum.
D \text{D} : Charge on the capacitor plates is minimum.
Choose the correct answer from the options given below:

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At the instant a capacitor is connected in a circuit, it behaves like a short circuit because there is no initial charge, and the potential difference across it is zero.
Updated On: Mar 18, 2025
  • C, D only
  • B, C, D only
  • A, C only
  • A, B, D only
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The Correct Option is B

Solution and Explanation


At the instant when the key is closed, the capacitor behaves as a short circuit because initially, it has no charge, and no potential difference across it.
A A : There will be no current through resistor R R .
This is false because current flows initially as the capacitor behaves as a short circuit.
B B : There will be maximum current in the connecting wires.
This is true because the capacitor is uncharged initially, and maximum current will flow through the circuit.
C C : Potential difference between the capacitor plates A and B is minimum.
This is true because the capacitor is uncharged initially, so the potential difference across it is zero.
D D : Charge on the capacitor plates is minimum.
This is true because the capacitor is initially uncharged.
Thus, the correct answer is: (2). \boxed{(2)}.
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