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Question

# The circuit was in the shown state for a long time. Now if the switch S is closed then the net charge that flows through the switch S , will be:

A
4003μC
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B
100μC
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C
1503μC
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D
50μC
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Solution

## The correct option is C 1503μCRef. image Q1=Q′+Q−Q1Q′=2Q1−QEquivalent capacitance /circuit ref. image Total charge through circuit Q=CV =(3×10−6×50)C =150μC Charge through 2μC capacitor will be=1503 Charge through 4μC capacitor will be=2×1503 Charge through switch will be, Q′=2Q1−Q =−1503μC in the downward direction or =1503μC in reverse direction

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