Photoelectric Effect: JEE Questions & Solutions

A light wave described by E = 60[ (3 10^15t) + (12 10^15t)] (in SI units) falls on a metal surface of work function 2.8 eV. The maximum…

The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV, respectively. If we incident a light of wavelength 550 nm…

A light source of wavelength illuminates a metal surface, and electrons are ejected with a maximum kinetic energy of 2 eV. If the same…

In the photoelectric effect, an electromagnetic wave is incident on a metal surface and electrons are ejected from the surface. If the work…

In photoelectric effect, the stopping potential V0 vs frequency curve is plotted. h is the Planck's constant and 0 is the work function of…

The ratio of the power of a light source S1 to that of the light source S2 is 2. S1 is emitting 2 10^15 photons per second at 600 nm. If…

Which of the following phenomena cannot be explained by the wave theory of light?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Emission of…

In an experiment with photoelectric effect, the stopping potential:

The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In photoelectric effect,…

A photo-emissive substance is illuminated with a radiation of wavelength i so that it releases electrons with de-Broglie wavelength e. The…

The threshold frequency of a metal with work function 6.63 eV is:

The work function of a substance is 3.0 eV. The longest wavelength of light that can cause the emission of photoelectrons from this…

UV light of 4.13 eV is incident on a photosensitive metal surface having a work function of 3.13 eV. The maximum kinetic energy of the…

From the photoelectric effect experiment, the following observations are made. Identify which of these are correct: A. The stopping…

Given below are two statements: Statement I: Stopping potential in photoelectric effect does not depend on the power of the light source.…

The threshold wavelength for photoelectric emission from a material is 5500 Å. Photoelectrons will be emitted when this material is…

A point source of light is placed at the centre of curvature of a hemispherical surface. The source emits a power of 24 W. The radius of…

If the two metals A and B are exposed to radiation of wavelength 350 nm. The work functions of metals A and B are 4.8 eV and 2.2 eV. Then…

The variation of stopping potential (V0) as a function of the frequency (v) of the incident light for a metal is shown in the figure. The…

Given below are two statements: Statement I: Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective…