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Q.

The circuit shown in the figure consists of a charged capacitor of capacity 3μF and a charge of 30μC . At time t=0 , when the key is closed, the value of current flowing through the 5 MΩ resistor is ‘x’μA.The value of ‘x’ to the nearest integer is ____

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answer is 2.

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Detailed Solution

At t=0 capacitor will behave like a battery So Q=CV ⇒30×10−6=3×10−6×V ⇒V=10 volt Applying Ohm's Law , V=IR ⇒10=I×5×106 ⇒I=105×106=2×10−6=2μA

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