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NEET UG PHYSICS MCQ: DUAL NATURE OF RADIATION AND MATTER

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Application +4 | -1

In photoelectric experiment energy of

2.48 \mathrm{~eV}

irradiates a photo sensitive material. The stopping potential was measured to be

0.5 \mathrm{~V}

. Work function of the photo sensitive material is :

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Correct option: D

1.98 \mathrm{~eV}

Option D (

1.98 \mathrm{~eV}

) is correct because the work function can be calculated by subtracting the stopping potential energy from the incident photon energy.

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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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