Resistor and capacitor voltage

Question

Answer 1

Volltage :

current where .

Resistance

Substitute correponding values in the above equation.

current where .

Substitute correponding values in the above equation.

.

Answer 2

(2)

Step 1 :

The capcitor is .

Initial voltage is .

Circuit current is where .
Voltage across capacitor : .

Voltage across capacitor initially zero.

Substitute , and in voltage at capacitor .

Step 2 :

Circuit current is where .

Initial voltage is .

Substitute , and in voltage at capacitor .

Solution :