The switch in the circuit has been in position a for a long time. At t=0 the switch is moved to position b.
A.Calculate the initial voltage on the capacitor if v = 200V , and i = 1.9mA .
B. Calculate the final voltage on the capacitor.
C. Calculate the time constant for t>0
D. Calculate the length of time required for the capacitor voltage to reach zero after the switch is moved to position b.