Q.

 If the wavelength of incident radiation in a photoelectric experiment is decreased then

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a

 the stopping potential will decrease.

b

 the stopping potential will increase.

c

 the photoelectric current will increase.

d

 the photoelectric current will decrease.

answer is D.

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Detailed Solution

Change in wavelength of incident light has no effect on the photocurrent.

Decreasing the wavelength of incident radiation means energy of incident light is increased, so kinetic energy of photoelectron increases and hence stopping potential also increases.

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