Draw suitable graphs to show the variation of photoelectric current with collector plate potential for a fixed frequency but different intensities ${\mathrm{I}}_1>{\mathrm{I}}_2>{\mathrm{I}}_3$ of radiation. A fixed intensity but different frequencies ${\mathrm{v}}_1>{\mathrm{v}}_2>{\mathrm{v}}_3$ of radiation.

Fig. $19.13$ shows the variation of stopping potential ${\mathrm{V}}_0$ with the frequency v of the incident radiation for two photosensitive metals $\mathrm{X}$ and $\mathrm{Y}$. 

Which of the metals has a larger threshold wavelength? Give reasons.

Fig. $19.13$ shows the variation of stopping potential ${\mathrm{V}}_0$ with the frequency v of the incident radiation for two photosensitive metals $\mathrm{X}$ and $\mathrm{Y}$. 

Explain giving reasons, which metal gives out electrons, having larger kinetic energy, for the same wavelength of incident radiation

Fig. $19.13$ shows the variation of stopping potential ${\mathrm{V}}_0$ with the frequency v of the incident radiation for two photosensitive metals $\mathrm{X}$ and $\mathrm{Y}$. 

If the distance between the light source and metal X is halved, how will the kinetic energy of electrons emitted change? Give reason.