2. SECTION – A Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate
3. Problem 01 Eddy currents are used in Induction furnace Electromagnetic brakes Speedometers All of these
4. Problem 02 Rectifier converts Mechanical energy to electrical energy A.C. to D.C Light energy to electrical energy None of these
5. Problem 03 What are the dimensions of K = 1/4πε0 C2N-1m-2 Nm2C-2 Nm2C2 Unit less
6. Problem 04 Which scientist experimentally proved the existence of electromagnetic waves? Sir. J.C. Bose Maxwell Marconi Hertz
7. Problem 05 For formation of permanent magnets, the material should have high coercivity low coercivity high retentivity both (a) and (c)
8. Problem 06 In order to obtain a real image of magnification 2 using a converging lens of focal length 20 cm, where should be an object be placed? 50 cm 30 cm -50 cm -30 cm
9. Problem 07 Which of the following is not transducer? loudspeaker amplifier microphone all of these
10. Problem 08 A bucket full of water is revolved in vertical circle of 2 m. What should be the maximum time-period of revolution so that the water doesn't fall off the bucket? 1 sec 2 sec 3 sec 4 sec
11. Problem 09 A ball is dropped from a height of 20 cm. Ball rebounds to a height of 10 cm. What is the loss of energy? 25% 75% 50% 100%
12. Problem 10 When you move from equator to pole, the value of acceleration due to gravity (g) Increases decreases remains the same increases then decreases
13. Problem 11 A simple pendulum has time period T. The bob is given negative charge and surface below it is given positive charge. The new time period will be less than T greater than T equal to T infinite
14. Problem 12 A bullet loses 1/20 of its velocity after penetrating a plank. How many planks are required to stop the bullet? 6 9 10 13
15. Problem 13 An aero plane 400 m due north and 300 m due south and then flies 1200 m upwards then net displacement is 1200 m 1300 m 1400 m 1500 m
16. Problem 14 Which law is a direct corollary of the law of conservation of energy? Lenz's law Kirchhoff's law Maxwell's law Ampere's law
17. Problem 15 Isogonics lines on magnetic map will have zero angle of dip zero angle of declination same angle of declination same angle of dip
18. Problem 16 Pressure gradient has the same dimension as that of velocity gradient potential gradient energy gradient none of these
19. Problem 17 Hydraulic press is based on Archimedes principle Bernoulli's equation Pascal's law Reynold's law
20. Problem 18 If fundamental frequency of closed pipe is 50 Hz then frequency of 2,,d overtone is 100 Hz 50 Hz 250 Hz 150 Hz
21. Problem 19 A boat of mass 40 kg is at rest. A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat? 4 m/s 2 m/s 8 m/s 1 m/s
22. Problem 20 Which of the following has negative temperature coefficient of resistance? copper Aluminum iron Germanium
23. Problem 21 At which place, earth's magnetism become horizontal? magnetic pole geographical pole magnetic meridian Magnetic equator
24. Problem 22 Magnetic dipole moment is a scalar quantity Vector quantity Constant quantity None of these
25. Problem 23 What is the shape when a non-wetting liquid is placed in a capillary tube? Concave upward Convex upward Concave downward Convex downward
26. Problem 24 Application of Bernoulli's theorem can be seen in Dynamic lift of aeroplane Hydraulic press Helicopter None of these
27. Problem 25 Unit of reduction factor is Ampere Ohms Tesla Weber
28. Problem 26 Huygen wave principle allows us to know The wavelength of the wave The velocity of the wave The amplitude of the wave The propagation of wave fronts
29. Problem 27 Which of the following is secondary cell? Voltaic cell Daniel cell Leclanche cell Edison cell
31. Problem 29 Radio frequency choke uses core of Air iron Air and iron None of these
32. Problem 30 If a thermometer reads freezing point of water as 20°C and boiling point as 150°C, how much thermometer read when the actual temperature is 60°C? 98°C 110°C 40°C 60°C
33. Problem 31 Apparatus used to find out velocity of sound in gas is Melde's apparatus Kundt's tube Quincke's tube None of these
34. Problem 32 When the atmospheric temperature becomes nearly equal to the dew point, then Relative humidity is 100% Relative humidity is 90% Relative humidity is 50% Nothing can be said
35. Problem 33 Current provided by a battery is maximum whe: Internal resistance equal to external resistance Internal resistance is greater than external resistance Internal resistance is less than external resistance None of these
36. Problem 34 If the temperature of atmosphere is increased the following character of sound waves is effected Amplitude Frequency Velocity Wavelength
37. Problem 35 A thin aluminum sheet is placed between the plates of a parallel plate capacitor. Its capacitance will Increases Decreases Remain same Become infinite
38. Problem 36 A heater coil connected to a supply of a 220 V is dissipating some power P1. The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power P2 The ratio of power P1 : P2 is 2 : 1 1 : 2 1 : 4 4 : 1
39. Problem 37 Order of e/m ratio of proton, α-particle and electron is e > p > α p > α > e e > α > p none of these
40. Problem 38 A body is projected with zero velocity from the top of a tower and it reaches the ground in 4 sec. Calculate the distance travelled 80 m 160 m 90 m 40 m
41. Problem 39 Ultraviolet rays are used in to detect scripture of old monuments forensic labs green house none of the above
42. Problem 40 A ray of light passing through the optic centre of a thick lens is displaced and deviated displaced but not deviated not displaced and but deviated none
43. Problem 41 X-rays do not show polarization diffraction transverse wave characteristics longitudinal waves characteristics.
44. Problem 42 According to Bohr's postulates which of the following quantities takes discrete values? kinetic energy potential energy angular momentum momentum
45. Problem 43 An electron moves with uniform velocity v and enters a region of uniform magnetic field B. If v and B are parallel to each other, then the electron will continue to move in the same direction move in a direction perpendicular to B move in a circular path will not move
46. Problem 44 The energy released per fission of a92U235 nucleus is nearly 200 eV 20 MeV 200 MeV 2000 eV
47. Problem 45 The first atomic reactor was designed by Niel Bohr E. Rutherford E. Fermi George Gamov
48. Problem 46 Astigmatism can be corrected by using biofocal lenses concave spherical lenses plane convex lenses cylindrical lenses
49. Problem 47 Blue colour of the sky is due to scattering of light dispersion of light interference sun emits more of blue light
50. Problem 48 The isotope generally used for the treatment of blood cancer is O15 Ag191 Hg197 I131
51. Problem 49 If the amount of heat energy received per unit area from sun is measured on earth, mars and Jupiter, it will be the same for all in decreasing order jupiter, mars, earth in increasing order jupiter, mars, earth in decreasing order mars, earth, jupiter.
52. Problem 50 Mark the wrong statement Jupiter is the biggest of all known planets Mar is called red planet Venus is called sky planet Saturn has no rings around it.
