Test Instructions:
- This Mock test contains 30 MCQ questions.
- Choice and sequence for attempting questions will be as per the convenience of the candidate.

- Read each question carefully.
- Determine the one correct answer out of the four available options given for each question.

- Each question awards you 1 point.
- You can end the test any time by clicking “quiz summary>finish quiz”.


- The mock test will automatically be submitted when the time is up.

- You can review all questions once again and evaluate your mistakes by clicking “view questions” when the result is displayed.

- You can apply for Leaderboard when the result is displayed.

- You can re-attempt the exam as per your wish, yet scores of the first attempt will be recorded!
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Question 1 of 30
1. Question
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18. Question
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Question 19 of 30
19. Question
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Question 20 of 30
20. Question
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Question 21 of 30
21. Question
1 point(s)When a light of wavelength 4000 Å falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 6000 Å is sufficient for photo emission. The work functions of the two emitters are in the ratio of
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Question 22 of 30
22. Question
1 point(s)Light of two different frequencies whose photons have energies 1eV and 2.5eV respectively, successively illuminate a metallic surface whose work function is 0.5eV. Ratio of maximum speeds of emitted electrons will be
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Question 23 of 30
23. Question
1 point(s)When the light of frequency 2v0 (where v0 is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is v1. When the frequency of the incident radiation is increased to 5v0, the maximum velocity of electrons emitted from the same plate is v2. The ratio of v2 to v2 is
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Question 24 of 30
24. Question
1 point(s)For photoelectric emission from certain metal the cut – off frequency is v. If radiation of frequency 2 v impinges on the metal plate , the maximum possible velocity of the emitted electron will be (m is the electron mass).
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Question 25 of 30
25. Question
1 point(s)An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final velocity will be
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Question 26 of 30
26. Question
1 point(s)The photoelectric threshold wavelength of silver is 3250×10^−10. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10^−10m is (Given h=4.14×10^−15eVs and c=3×10^8ms−1)
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Question 27 of 30
27. Question
1 point(s)When monochromatic light of wavelength λ illuminates a metal surface, then stopping potential for photo electric current is 3V(0). If wavelength changes to 2λ then stopping potential becomes V(0) Threshold wavelength for photo electric emission is:
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Question 28 of 30
28. Question
1 point(s)The energy of an electron having de-broglie wavelength λ is (h = Plank’s Constant and m= mass of electron)
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Question 29 of 30
29. Question
1 point(s)Photons with energy 5eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is
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Question 30 of 30
30. Question
1 point(s)An electron of mass m, when accelerated through a potential difference V has de Broglie wavelength λ. The de Broglie wavelength associated with a proton of mass M accelerated through the same potential difference, will be
CorrectIncorrect