The minimum energy required to remove an electron from the surface of a metal is called:

$A$ photocell is illuminated by a small lamp placed at a distance of $1 \ m$. If the lamp is shifted to a distance of $2 \ m$,then the number of emitted electrons will be:

Which of the following is dependent on the intensity of incident radiation in a photoelectric experiment?

The magnitude of saturation photoelectric current depends upon

The curves $(a), (b), (c)$ and $(d)$ show the variation between the applied potential difference $(V)$ and the photoelectric current $(i)$,at two different intensities of light $(I_1 > I_2)$. In which figure is the correct variation shown?

Write the characteristics of the photoelectric effect.