Class 12PhysicsDual Nature of Radiation and matterPhotoelectric Effect by Lenard and it's Observations
EasyThe work function of a metal is defined as:
- AThe maximum possible energy acquired by an electron.
- BEqual for all metals.
- CThe minimum energy required by an electron to just eject from the metal surface.
- DThe maximum energy given to an electron to move out of the metal surface.
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Similar Questions
$A$ photoelectric cell is illuminated by a point source of light $1 \ m$ away. When the source is shifted to $2 \ m$,then:
The anode voltage of a photocell is kept fixed. The frequency of the light falling on the cathode is gradually increased. Then the correct graph which shows the variation of photo current $I$ with the frequency $\nu$ of incident light is
MediumKCET 2025
View SolutionThe cathode of a photoelectric cell is changed such that the work function changes from $W_1$ to $W_2$ $(W_2 > W_1)$. If the current before and after change are $I_1$ and $I_2$,all other conditions remaining unchanged,then (assuming $h\nu > W_2$):
In the photoelectric effect,electrons are ejected from metals if the incident light has a certain minimum:
After a photon is incident on a metal surface,the time taken for the emission of a photoelectron from the surface is approximately ...........
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