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 average source current in Amps in steady-state is

1. $3/2$
2. $5/3$
3. $5/2$
4. $15/4$

edited