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Questions  

In a photoelectric experiment, the wavelength of the incident light is decreased from 6000  to 4000  . While the intensity of radiations remains the same,

a
the cut-off potential will decrease
b
the cut-off potential will increase
c
the photoelectric current will increase
d
the kinetic energy of the emitted electrons will increase

detailed solution

Correct option is B

Existence of cut-off frequency and photoemission takes when intensity is low.

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