GATE EE 2016 Set 2 — Question 47
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Electric Circuits → Transient & AC Steady-State → First-Order RL & RC
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Question
In the circuit shown below, the initial capacitor voltage is 4 V. Switch is closed at . The charge (in C) lost by the capacitor from to is ____________.
Correct answer
6.8 to 7.2
Solution
The capacitor discharges through the resistor. The voltage across the capacitor is given by .
Given , , and .
The time constant .
The charge on the capacitor is .
The charge lost from to is:.
Given , , and .
The time constant .
The charge on the capacitor is .
The charge lost from to is:.
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