A fully charged capacitor with a voltage of 270 kV is discharged through a resis

Question

A fully charged capacitor with a voltage of 270 kV is discharged through a resistor.

(a) What is the voltage across the capacitor atthe end of four time constants? (b) At this time, what is the voltage acrossthe resistor?
I'm having a really tough time with this oneand feel that I know the material. Help would be mostappreciated and will rate lifesaver!
(a) What is the voltage across the capacitor atthe end of four time constants? (b) At this time, what is the voltage acrossthe resistor?
I'm having a really tough time with this oneand feel that I know the material. Help would be mostappreciated and will rate lifesaver!

Explanation / Answer

   a.   Voltage across capacitorduring discharge is          V   =   V0* e-t/    Given fullvoltage   V0   =   270* 103   V    t   =   4 *    V   =   270 *103 * e-4 /          =   270* 103 * e-4          =   4.94 *103   V          =   4.94 *103   V    b.   Since the resistor isnow in parallel to the capacitor same voltage appears across theresistor.        VR   =   V             =   4.94* 103   V

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