Recent questions tagged electrons and photons

+2 votes

1 answer

This question Statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two statements.

asked Mar 22, 2019 in JEE by kratos

+1 vote

1 answer

This question has Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.

asked Mar 20, 2019 in JEE by kratos

+1 vote

1 answer

Photon of frequency ν has a momentum associated with it.

asked Mar 19, 2019 in JEE by kratos

+1 vote

1 answer

The time by a photoelectron to come out after the photon strikes is approximately.

asked Mar 17, 2019 in JEE by kratos

+3 votes

1 answer

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor

asked Mar 15, 2019 in JEE by kratos

+2 votes

1 answer

A cesium photocell with a steady potential difference of 60 V across it, is illuminated by a small bright light placed 1 m away.

asked Mar 15, 2019 in JEE by kratos

+2 votes

1 answer

The anode voltage of a photocell is kept fixed. The wavelength λof the light falling on the cathode is gradually changed.

asked Feb 12, 2019 in Class 12 by kratos

+1 vote

1 answer

Statement-1 : When ultraviolet light is incident on a photocell,

asked Feb 3, 2019 in JEE by kratos

+1 vote

1 answer

According to Einstein’* photoelectric equation, the plot of the kinetic energy of the emitted photo electrons from a metal vs the frequency,

asked Jan 27, 2019 in Class 12 by kratos

+2 votes

1 answer

Electrons accelerated by potential V are diffracted from a crystal.

asked Jan 20, 2019 in JEE by kratos

+2 votes

1 answer

This question has Statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two statements.

asked Jan 17, 2019 in JEE by kratos

+1 vote

1 answer

A photocell is illuminated by a small bright source placed 1m away.

asked Jan 3, 2019 in Physics by kratos

+1 vote

1 answer

The anode voltage of a photocell is kept fixed. The wavelength (λ) of the light falling on the cathode is gradually changed.

asked Dec 31, 2018 in Physics by kratos

+1 vote

1 answer

In an experiment, electrons are made to pass through a narrow slit of width d comparable to their de Broglie wavelength.

asked Dec 31, 2018 in JEE by kratos

+2 votes

1 answer

Two metals A and B have work functions 2eV, 4eV respectively. Which metal has a lower threshold

asked Dec 9, 2018 in JEE by kratos

+1 vote

1 answer

Two identical, photo-cathodes receive light of frequencies f1 and f2. If the velocities of the photo-electrons

asked Dec 2, 2018 in JEE by kratos

+1 vote

1 answer

If the kinetic energy of a free electron doubles. Its deBroglie wavelength changes by the factor

asked Nov 30, 2018 in JEE by kratos

+3 votes

1 answer

This question has Statement 1 and Statement 2. Of the four choices given after the statements, choose the one that best describes the two statements.

asked Nov 13, 2018 in JEE by kratos

+1 vote

1 answer

If a source of power 4kW produces 10^20photons/second,

asked Oct 27, 2018 in JEE by kratos

+2 votes

1 answer

Two identical photocathodes receive light of frequencies f1 and f2 .

asked Oct 1, 2018 in JEE by kratos

To see more, click for the full list of questions or popular tags.

...