4, A 20uF capaci is to 12 and then discharged through a 4.0M n istor. How long w

Question

4, A 20uF capaci is to 12 and then discharged through a 4.0M n istor. How long will it take for tor to drop to 3.0V? answer the voltage across the capacitor Restate Summarize outline yoursolution 5. A 6.0uF capacitor is charged to 15V and then discharged through a 1.0Mn resistor. When will the power used by the resistor be its maximum value? answer Restate your solution ne your 6. A 12.0muF capacitor is charged to 25v and then discharged through a 500kn resistor. When will the current be 1/2 of its maximum value? Restate your answer Summarize/outline your solution

Explanation / Answer

4.

Time constant

T=RC=(4*106)(2*10-6)=8 s

In a RC circuit voltage as a function of time for discharging is given by

V=Voe-t/T

3=12e-t/8

-t/8 =Ln(3/12)

t=11.1 seconds

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