Physics Electron, Photon, Photoelectric Effect and X-rays MHT CET Previous Year Question MCQ (Single Correct)

Light of wavelength which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with some velocity then stopping potential will

A
increase
B
decrease
C
be zero
D
become exactly half.

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Verified by Experts
The correct answer is:
A

According to Einstein's photoelectric equation,

As is constant, so when is decreased, stopping potential increases.

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