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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. |
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