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7.55 The switch in the circuit of Fig. P 7.55 has been in position a for a long time. At t- 0 the switch is moved to position b. Calculate (a) the initial voltage on the capacitor; (b) the final volt...

The switch in the circuit of Fig. P 7.55 has been in position a for a long time. At t- 0 the switch is moved to position b. Calculate (a) the initial voltage on the capacitor; (b) the final voltage on the capacitor; (c) the time constant (in microseconds) for t > 0; and (d) the length of time (in microseconds) required for the capacitor voltage to reach zero after the switch is moved to position b. 

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7.55 The switch in the circuit of Fig. P 7.55 has been in position a for a long time. At t- 0 the switch is moved to position b. Calculate (a) the initial voltage on the capacitor; (b) the final volt...
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