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Switch S was opened for long time and is suddenly closed Voltmeter & ammeters are ideal then

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Reading of voltmeter just after closing S is 20 V

Reading of voltmeter just after closing S is 2V

Reading of Ammeter after S has been closed for a very long time is 0 Amp

Reading of voltmeter after S has been closed for a very long time is 0 volt

answer is A, D.

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Detailed Solution

Option ( A ) just after closing S there will be no current through circuit.
Option (D) After long time of closing of S induction behave as wire

$∴ i = \frac{20}{50 + 25} = \frac{20}{75}$

Reading of (V) = $V_{a} - V_{b} = 0$

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