Physics Matrak in Hindi

Physics Matrak in Hindi. We covered all the Physics Matrak in Hindi MCQs in this post for free so that you can practice well for the exam.

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Physics Matrak in Hindi Objective for Students

According to Moseley's Law, the frequency of the spectral line in the X-ray spectrum varies as:

a. Atomic number of the element

b. Square of the atomic number of the element

c. The square root of the atomic number of the element

d. The fourth power of the atomic number of the element

Show Answer

The photoelectric work function for a metal surface is nearly 4.125 eV. The cutoff wavelength for this surface is:

a. 4125 A°

b. 2062.5 A°

c. 3000 A°

d. 6000 A°

Show Answer

In a photoelectric phenomenon, the number of photoelectrons emitted depends on:

a. The intensity of incident radiation

b. The frequency of incident radiation

c. The velocity of incident radiation

d. The work function of the photocathode

Show Answer

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