Dawn of Modern Physics Test Online Preparation Mcqs

Dawn of Modern Physics Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. U.V radiations of 6.2eV falls on an aluminium surface, K.E of fastest electron emitted is (work function = 4.2eV)
A.
B.
C.
D.

Question 1 of 15

Question 2 of 15

2. In Compton scattering, the change in wave length is max. if _______.
A.
B.
C.
D.

Question 2 of 15

Question 3 of 15

3. Davison Germer experiment indicates ______
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B.
C.
D.

Question 3 of 15

Question 4 of 15

4. The slope of frequency of incident light and stopping potential for a given surface will be:
A.
B.
C.
D.

Question 4 of 15

Question 5 of 15

5. For confinement of electron in a box of radius 10-14m, the electron speed should be ______.
A.
B.
C.
D.

Question 5 of 15

Question 6 of 15

6. A photoelectric cells converts
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B.
C.
D.

Question 6 of 15

Question 7 of 15

7. Linear momentum of a  photon is ________
A.
B.
C.
D.

Question 7 of 15

Question 8 of 15

8. Which of the following is not a form of uncertainty principles
A.
B.
C.
D.

Question 8 of 15

Question 9 of 15

9. A device based on photoelectric effect is called ________.
A.
B.
C.
D.

Question 9 of 15

Question 10 of 15

10. Stopping potential for a metal surface in case of photoelectric emission depends on __________.
A.
B.
C.
D.

Question 10 of 15

Question 11 of 15

11. If the wavelength of incident radiation in a photoelectric experiment is decreased then
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B.
C.
D.

Question 11 of 15

Question 12 of 15

12. The energy radiated is directly proportional to fourth power of Kelvin’s temperature is ________.
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B.
C.
D.

Question 12 of 15

Question 13 of 15

13. If a photon is reflected from the mirror, then the change in momentum of each photon is _____.
A.
B.
C.
D.

Question 13 of 15

Question 14 of 15

14. The speed of cathode rays is
A.
B.
C.
D.

Question 14 of 15

Question 15 of 15

15. Einstein’s photoelectric equation is given by _________.
A.
B.
C.
D.

Question 15 of 15


 

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