In a photoelectric experimental setup ultraviolet light of wavelength $350 \mathrm{nm}$ is incident on emitter plate $\left(E\right)$. The work function of the emitter plate is $\varphi =2.2\mathrm{eV}.\mathrm{AB}$ is a uniform wire resistor having length $\mathrm{L}=100 \mathrm{cm}$. Resistance of the wire $\mathrm{AB}$ is $10\Omega$ and the emf of the battery is $\mathrm{V}=10$ volt. The sliding contact $\mathrm{J}$ can be moved along the wire $\mathrm{AB}$. When the sliding contact is placed at end $\mathrm{B}$ of the wire resistor the micro-ammeter shows a reading of $\mathrm{i}=6\mu \mathrm{A}$. Assume that photoelectric current is very small compared to the current through the cell. Find the reading of the ammeter (in $\mu \mathrm{A}$ ) when the slider is moved to end $\mathrm{A}$ of the wire.