9. In Figure 8, the switch S has been closed for a long time and the circuit carries a constant current. 30 V S M 6k03 W 3ΚΩ 500 Ω W 12μF Figure 8. (a) What is the voltage across the capacitor? Show your work or explain. (b) Now the switch S is opened at t = 0. (Switch S is open for all questions below) (i) What is the initial discharge current through the 50052 resistor? (ii) How long does it take the capacitor to discharge to one-fifth of its original voltage? (iii) Determine the charge on the capacitor at time t = 0.05 s. (iv) What is the amount of charge left on the capacitor after 75 time constants has passed(t = 75RC).

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