In the figure shown below, the chopper feeds a resistive load from a battery source. $MOSFET\: Q$ is switched at $250 kHz$ with a $\text{duty ratio}$ of $0.4$. All elements of the circuit are assumed to be ideal.

The PEAK-TO-PEAK source current ripple in $Amps$ is

1. $0.96$
2. $0.144$
3. $0.192$
4. $0.288$

edited