Wave Optics & Electrostatics
- 18 August 2021
Test Instructions:
- This Mock test contains 30 MCQ questions of 15 questions each chapter.
- 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 for each question.
- 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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19 August –Physics ( Current Electricity & AC Circuit)Chemistry ( Transition and Inner Transition Element )Biology ( Human Health and Diseases & Enhancement of Food Technology )Mathematics ( Differentiation & Application of Derivatives )
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Question 1 of 30
1. Question
1 point(s)What happens if one of the slits, say S1 in Young’s double , slit experiment-is covered with a glass plate which absorbs half the intensity of light from it?
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Question 2 of 30
2. Question
1 point(s)What happens to the interference pattern the two slits S1 and S2 in Young’s double experiment are illuminated by two independent but identical sources?
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Question 3 of 30
3. Question
1 point(s)What is the reason for your answer to the above question?
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Question 4 of 30
4. Question
1 point(s)A single slit diffraction pattern is obtained using a beam of red light What happened the red light is replaced by the blue light?
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Question 5 of 30
5. Question
1 point(s)When a polaroid is rotated, the intensity of light varies but never reduces to zero. It shows that the incident light is:
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Question 6 of 30
6. Question
1 point(s)When a polaroid is rotated, the intensity of light does not vary. The incident light may be:
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Question 7 of 30
7. Question
1 point(s)In Young’s double slit experiment, a maximum is obtained when the path difference between the interfering waves is (n ∈ l):
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Question 8 of 30
8. Question
1 point(s)For sustained interference, we need two sources which
emit radiations : -
Question 9 of 30
9. Question
1 point(s)Two sources of light are said to be coherent when both give out light waves of the same:
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Question 10 of 30
10. Question
1 point(s)The intensity of light emerging from the two slits, in Young’s experiment is in the ratio 1 : 4. The ratio of,the intensity of the minimum to that of the consecutive maximum will be:
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Question 11 of 30
11. Question
1 point(s)Poisson’s bright spot was discovered by:
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Question 12 of 30
12. Question
1 point(s)The theory of expanding universe is confirmed by the observation of the spectral lines of the star, which shows :
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Question 13 of 30
13. Question
1 point(s)The application of Doppler effect are:
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Question 14 of 30
14. Question
1 point(s)Which of the following is conserved when light waves interefere?
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Question 15 of 30
15. Question
1 point(s)In Young double slit experiment, a minimum is obtained when the phase difference of the superposing waves, is (n ∈ l):
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Question 16 of 30
16. Question
1 point(s)The work done in placing a charge of 8 uC on a condenser of capacity 100 nF is________
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Question 17 of 30
17. Question
1 point(s)A parallel plate air capacitor has a capacity of 2 pF. If the separation between its plates is doubled and a mica sheet is introduced between its plates, its capacity becomes 6 pF. What is the dielectric constant of mica ?
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Question 18 of 30
18. Question
1 point(s)A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved apart by means of insulating handles, then__________
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Question 19 of 30
19. Question
1 point(s)A capacitor of capacity C is connected to a power source then disconnected from the source and the spacing between its plates is reduced to half. Which one of the following quantities is reduced ___________
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Question 20 of 30
20. Question
1 point(s)The capacitance of a parallel plate capacitor depends upon_________
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Question 21 of 30
21. Question
1 point(s)The separation between the plates of a charged parallel plate capacitor is doubled by keeping the charge constant. In this case___________
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Question 22 of 30
22. Question
1 point(s)A dielectric slab is introduced between the plates of a parallel plate charged capacitor. Which one of the following quantities will not change?
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Question 23 of 30
23. Question
1 point(s)M and N are the plates of unequal areas of a parallel plate capacitor. Let A1 and A2 be the areas of M and N. Let A1 > A2. M and N are connected to the +ve and -ve terminals of a battery. If Q+ and Qare the charges on the plates M and N respectively, then_____________
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Question 24 of 30
24. Question
1 point(s)The main function of a capacitor is to_________
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Question 25 of 30
25. Question
1 point(s)The electric potential at the surface of an atomic nucleus having z = 50 and radius = 9.0 x 10-¹³ cm is________
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Question 26 of 30
26. Question
1 point(s)An electric charge produces an electric intensity of 500 N/C, at a point in air. If the air is replaced by a medium of dielectric constant 2.5, then the intensity of the electric field due to the same charge at the same point will be________
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Question 27 of 30
27. Question
1 point(s)The potential difference betweer two plates, separated by a distance of 2 cm. The linear charge density is___________
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Question 28 of 30
28. Question
1 point(s)The unit of absolute permittivity of a medium is________
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Question 29 of 30
29. Question
1 point(s)In practice, earth is chosen as a place of zero electric potential because it is___________
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Question 30 of 30
30. Question
1 point(s)The electric potential due to the nucleus of the hydrogenatom at a distance of 5.3 x 10-¹¹ m is 27.2 V. What is the potential due to the helium nucleus at the same distance?