In the circuit shown in fig. the switch is kept closed in position 1 for a long time. At time `t = 0` the switch is moved to position 2. Write the dependence of voltage `(V_C)` across the capacitor as a function of time (t). Take `V_(C)` to be positive when plate a is positive. Given: `R_(1) = 20 Omega, R_(2) = 60 Omega, R_(3) = 400 kOmega, V_(1) = 40 V, V_(2)= 90 V and C = 0.5 mu F`.

In the circuit shown in fig. the switch is kept closed in position 1 f

1.	In the circuit shown in fig. the switch is kept closed in position 1 for a long time. At time `t = 0` the switch is moved to position 2. Write the dependence of voltage `(V_C)` across the capacitor as a function of time (t). Take `V_(C)` to be positive when plate a is positive. Given: `R_(1) = 20 Omega, R_(2) = 60 Omega, R_(3) = 400 kOmega, V_(1) = 40 V, V_(2)= 90 V and C = 0.5 mu F`.
Answer» Correct Answer - `V_(C)=(90-120 e^(-5t))` volt

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