From the photoelectric effect experiment, following observations are made. Identify which of these are correct
A. The stopping potential depends only on the work function of the metal.
B. The saturation current increases as the intensity of incident light increases.
C. The maximum kinetic energy of a photo electron depends on the intensity of the incident light.
D. Photoelectric effect can be explained using wave theory of light.
Choose the correct answer from the options given below:

Given below are two statements :

Statement I : Stopping potential in photoelectric effect does not depend on the power of the light source.

Statement II : For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light.

In the light of above statements, choose the most appropriate answer from the options given below.

The threshold wavelength for photoelectric emission from a material is $5500 \stackrel{\circ }{\mathrm{A}}$. Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a

A. $75 \mathrm{W}$ infra-red lamp

B. $10 \mathrm{W}$ infra-red lamp

C. $75 \mathrm{W}$ ultra-violet lamp

D. $10 \mathrm{W}$ ultra-violet lamp

Choose the correct answer from the options given below :

If a source of electromagnetic radiation having power $15 \mathrm{kW}$ produces ${10}^{16}$ photons per second, the radiation belongs to a part of spectrum is :

(Take Planck constant $h = 6\times {10}^{-34} \mathrm{J} \mathrm{s})$