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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

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Application +4 | -1

The threshold frequency for a photosensitive metal is

3.3 \times {10^{14}}\,Hz.\,

If light of frequency

8.2 \times {10^{14}}\,Hz

is incident on this metal, the cut-off voltage for the photoelectric emission is nearly

View answer and explanation

Correct option: A

2 V

Option A (2 V) is correct because the cut-off voltage (stopping potential) can be calculated using the photoelectric equation, and it's approximately 2V.

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If the Broglie wavelengths associated with a proton and an

\alpha

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3 \to 2

transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of

3 \times {10^{ - 4}}\,T.

If the radius of the largest circular path followed by these electrons is 10.0 mm, the work function of the metal is close to The shortest wavelength of

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