List of top Physics Questions on Photoelectric Effect asked in UP Board XII

Write down Einstein's equation for the photoelectric effect.
Write down Einstein's photoelectric equation. Explain with the help of this equation that what is the effect on the maximum kinetic energy of the emitted electrons, if frequency of the incident light (photons) is increased by \( n \) times. What is the relationship between the work function of the metal surface and threshold wavelength?
What is the meaning of stopping potential in photoelectric effect?
The stopping potential for the photoelectric current is obtained as 4 V for a metal surface by a monochromatic light of wavelength \( \lambda \), incident on it. The stopping potential becomes \(V\) for the incident light of wavelength \( 2\lambda \) on this surface. Find the formula of threshold wavelength \( \lambda_0 \) in terms of \( \lambda \).
What is the photoelectric effect? Which nature of light is shown by it? Threshold frequency of a metal is \(2.3 \times 10^{14}\) Hz. If the frequency of incident light is \(8.2 \times 10^{14}\) Hz, what will be the stopping potential? Calculate work function of the metal also.

What is Biot-Savart law? Obtain the formula and direction for the intensity of the magnetic field on the axis of an anti-clockwise current-carrying loop with its help.

Which of the following laws of conservation holds in Einstein's photoelectric equation? 
 

A metal has work function of 2.0 eV and is illuminated by monochromatic light of wavelength 5000 \AA. Calculate (i) the threshold wavelength and (ii) the stopping potential.
Work function of silver is $4.7 \, \text{eV}$. When ultraviolet light of wavelength $100 \, \text{nm}$ is incident on it, the stopping potential obtained is $7.7 \, \text{V}$. Find out the value of the stopping potential for the wavelength of light of $200 \, \text{nm}$.
What is the photoelectric effect?
What is the photoelectric effect? For any photosensitive surface, the threshold frequency is \( 3.3 \times 10^{14} \, \text{Hz} \). If the frequency of incident light becomes \( 8.2 \times 10^{14} \, \text{Hz} \), then calculate the stopping potential and give the value of the work function of the surface also.
What is the photoelectric effect? For any photosensitive surface threshold frequency is \( 3.3 \times 10^{14} \, \text{Hz} \). If frequency of incident light becomes \( 8.2 \times 10^{14} \, \text{Hz} \), then calculate the stopping potential and give the value of work function of the surface also.
The wavelength of light incident on a metal surface of work function 2.14 eV is 5000 \(\overset{\text{\small o}}{\text{A}}\). Find the maximum kinetic energy and the maximum velocity of the emitted photoelectrons.
Write an expression of refractive index of a liquid relative to air in terms of velocity of light in liquid and in air. Derive the formula of apparent depth of an object placed in liquid.
The work function of a metal is \( 2.5 \times 10^{-9} \) joule. If the metal is exposed to a light beam of frequency \( 6.0 \times 10^{14} \) Hz, what will be the stopping potential?
The equation \( E = pc \), where \( E \), \( p \), and \( c \) represent energy, momentum, and velocity of light, is valid:
What is meant by threshold wavelength?