Photoelectric Effect - Questions & Answers | Exam2Win

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6. The threshold wavelength of photoelectric emission of a metal is 4000Å. Then the minimum energy required to eject photo electron is

A. 4.96 e V

B. 3.1 e V

C. 49.6 e V

D. 31 e V

Explanation:

7. Photo electric emission confirms

A. dual nature of radiation

B. corpuscular nature of radiation

C. wave nature of radiation

D. electromagnetic nature of radiation

Explanation:

8. Which of the following statement is incorrect

A. Photoelectric emission does not occur below the threshold frequency

B. The photoelectric current increases with the frequency of incident light

C. Threshold frequency does not depend on the metal used

D. The emission of photoelectrons is an instantaneous process

Explanation:

9. The phenomenon of photoelectric effect is

A. adiabatic process

B. instantaneous process

C. isothermal process

D. spontaneous process

Explanation:

10. The frequency of photon having an energy of 26.52 e V is

A. 64  1015 Hz

B. 6.4  1016 Hz

C. 6.4  1015 Hz

D. 64  1016 Hz

Explanation:

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