What is the effect of increasing the intensity of light that falls on the emitter in a photo electric effect apparatus ?

Cut-off frequency decrease.

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Stopping potential decrease.

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Time delay for emission of photo electron decrease.

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Saturation photo current increases.

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Solution

The correct option is C Saturation photo current increases.
Intensity cannot change the cut off frequency or stopping potential. High intensity means more number of photons, so chances of hitting to electron by them increase and hence more photo electron are emitted i.e., photo current increases.

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Q. Assertion :In photoelectric effect, at stopping potential emission of photo-electrons is stopped. Reason: Increases in intensity of given light increases the kinetic energy of photo-electron.

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Will the photo current increase on increasing intensity of the light source?

Q. The photo current in an experiment on photoelectric effect increases if
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State True or False.

In a photo-electric emission process, the maximum energy of the photo-electrons increases with increasing intensity of the incident light.

In an experiment on photo electric effect, light of wavelength 400 nm is incident on a cesium plate at the rate of 5.0 W. The potential of the collector plate is made sufficiently positive with respect to the emitter so that the current reaches its saturation value. Assuming that on the average one out of every $10^{6}$ photons is able to eject a photo electron, find the photo current in the circuit.

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What is the effect of increasing the intensity of light that falls on the emitter in a photo electric effect apparatus ?

The correct option is C Saturation photo current increases.Intensity cannot change the cut off frequency or stopping potential. High intensity means more number of photons, so chances of hitting to electron by them increase and hence more photo electron are emitted i.e., photo current increases.

The correct option is C Saturation photo current increases.
Intensity cannot change the cut off frequency or stopping potential. High intensity means more number of photons, so chances of hitting to electron by them increase and hence more photo electron are emitted i.e., photo current increases.