List of top Physics Questions on Photoelectric Effect asked in AP EAPCET

The energy of a photon of wavelength 2500 is 4.96 eV. When photons of wavelength 3100 incident on a photosensitive material of work function 2.2 eV, the maximum velocity of the emitted photoelectrons is:

The threshold frequency for a certain photosensitive metal surface is _0. When light of frequency 2_0 is incident on the surface, the maximum velocity of the emitted photoelectrons is v_1. If the frequency is increased to 5_0, the maximum velocity becomes v_2. The ratio v_1 : v_2 is:

The electric field associated with a monochromatic light wave is given by \[ E=E_0\sin\left[(1.57\times10^7\ \text{m}^{-1})(x-ct)\right] \] Then the stopping potential when this light is used in a photoelectric experiment with the metal having work function \(1.9\ \text{eV}\) is \([h=6.64\times10^{-34}\ \text{Js}]\):

The following statement is correct in the case of photoelectric effect

In a photoelectric experiment light of wavelength \(800\;nm\) produces photoelectrons with the smallest de Broglie wavelength of \(1\;nm\). Light of \(400\;nm\) produces photoelectrons with smallest de Broglie wavelength of \(0.5\;nm\). Then the work function of the metal used in the experiment is nearly