The curves (1), (2), (3) and (4) show the variation between the applied potential difference (V) and the photoelectric current (i), at two different intensities of light ( ${\mathrm{I}}_1>{\mathrm{I}}_2$). In which figure is the correct variation shown?

1.		2.
3.		4.

The value of stopping potential in the following diagram is given by:
   

When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2I what is the number of emitted electrons and their maximum kinetic energy?

The figure shows different graphs between stopping potential $\left({\mathrm{V}}_0\right)$ and frequency (\(\nu\)) for the photosensitive surfaces of cesium, potassium, sodium and lithium. The plots are parallel. The correct ranking of the targets according to their work function first will be:
   

The number of photo-electrons emitted per second from a metal surface increases when:

For a photoelectric cell, the graph showing the variation of the cut of voltage (V_o ) with frequency (v) of incident light is best represented by:

1.		2.
3.		4.

Which is the correct curve between the stopping potential (V₀) and the intensity of incident light (I)?

1.		2.
3.		4.

The graph between the intensity of light falling on a metallic plate (I) and the generated current (i) is given by:

1.		2.
3.		4.

If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å, then: