The frequency and the intensity of a beam of light falling on the surface of a photoelectric material are increased by a factor of two. This will

Options

A. increase the maximum kinetic energy, the photoelectrons, as well as photoelectric current by a factor of 2
B. increase the maximum kinetic energy of the photoelectrons and would increase the photoelectric current by a factor of 2
C. increase the maximum kinetic energy of the photoelectrons by a factor of 2 and will gave no effect on the magnitude of the photoelectric current produced
D. not produce any effect on the kinetic energy of the emitted electrins but will increase the photoelectric current by a factor of 2

Answer

B

Explanation

`((1)/(2)mv^(2))_(max)=hv-W`
When `upsilon` is doubled (W remains same), `((1)/(2)mv^(2))_(max)`
i.e., (KE) is increased. The photoelectric current is directly proportional to the intensity of incident light.