Question $5$

When the switch is flipped from position $2$ to position $1$ in Figure $1$ below, it produces a voltage across the capacitor shown in Figure $2$:

Figure $1$: Circuit Diagram

Figure $2$: Voltage across the capacitor

a$)$ Calculate the capacitance for the circuit assuming the time constant $=2$ seconds.

b$)$ Calculate the voltage V of the cell.

$($Ans: a$)C=20mF,$ b$)V=25V)$