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 Heat is transmitted from a higher temperature to a lower temperature through an actual motion of the molecules in Radiation Conduction Convection All of these
4. Problem 02 The decay constant of radium is 4.28 x 10-4 per year. Its half-life is approximately 620 Years 60 years 2000 years 1250 years
5. Problem 03 An observer looks at a tree of height 15 metres with a telescope of magnifying power 10. To him, the appears 10 times nearer 10 times taller 15 times nearer 15 times taller
6. Problem 04 The pitch of note depends upon its Amplitude frequency Frequency Speed Wavelength
7. Problem 05 The number of particles in one mole of a substance is known as Reynolds number Boltzmann constant Avogadro constant Planck’s consent
8. Problem 06 If the values of force (F) and length (L) increases 3 times, the value of work done (W) will increase 9 times 3 times 27 times 6 times
9. Problem 07 Absolute temperature can be calculated by Mass of the molecules Root mean square velocity of molecules Direction of motion of the molecules Motion of the molecules
10. Problem 08 Critical angle will be minimum, when a ray passes from Glass to water Air to glass Water to glass Glass to air
11. Problem 09 Bubbles are formed in a viscous liquid due to Vapour pressure Surface tension Elasticity Viscocity
12. Problem 10 If earth stands still. Then weight of a man will Remain the same Increase Become zero Decrease
13. Problem 11 The frequency of ultrasonic waves is Equal to audible range Above audible range Below audible range Either (a) or (c)
14. Problem 12 Hydrogen ballon will carry which of the following body most easily, 10 kg feather 10 kg cotton 10 kg iron All of these
15. Problem 13 The flow of heat from a hot end to a cold end of a rod is Directly proportional to the length of the rod Directly proportional to difference of temperatures Inversely proportional to the radius of the rod Inversely proportional to the difference of temperatures
16. Problem 14 If focal length of one lens is -40 cm and of other +20 cm, what will be the focal length of the combination? 35 cm 80 cm 30 cm 40 cm
17. Problem 15 A cylinder of 5 litres capacity, filled with air at N.T.P is connected with another evacuated cylinder of 30 litres of capacity. The resultant air pressure in both the cylinders will be 21.8 cm of Hg 10.8 cm of Hg 38.8 cm of Hg 14.9 cm of Hg
18. Problem 16 If a torch is used in place of monochromatic light in Young’s experiment, what will happen? No fringe will appear Fringe will occur as from monochromatic source Only bright fringe will appear Fringe will appear for a moment and then it will disappear.
19. Problem 17 The focal length of convex lens depends upon Amplitude of the light rays Frequency of the light rays Intensity of the light rays Wavelength of the light rays
20. Problem 18 Which of the following shows negative coefficient of temperature? Iron Carbon Manganese Silver
21. Problem 19 Capacity of the parallel plate capacitor can be increased by Increasing the thickness of the plate Increasing the distance between the plates Decreasing the thickness of the plate Decreasing the distance between the plates
22. Problem 20 If the reference angle of a prism is 600 and minimum deciation 300, what is its angle of incidence? 450 300 900 600
23. Problem 21 If an open organ pipe is sounded with a tuning fork having frequency 256 Hz, the resonance occurred at 35 cm and 105 cm, then the velocity of sound is 524 m/s 360 m/s 720 m/s 512 m/s
24. Problem 22 In an ideal gas, the energy is Totally potential Totally kinetic Difference of (a) and (b) Sum of (a) and (b).
25. Problem 23 If the density of oxygen is 16 times that of hydrogen, what will be the ratio of velocity of sound in oxygen and hydrogen? 2:1 1:4 1:16 4:1
26. Problem 24 The expansion during heating Increases the weight of material Occurs only in a solids Decreases the density of material Occurs at the same rate for all liquids and solids
27. Problem 25 Under elastic limit, stress is Independent of strain Directly proportional to strain Indirectly proportional to strain All of these
28. Problem 26 A current loop, placed in magnetic field, behaves like a Magnetic pole Magnetic dipole Magnetic substance All of these
29. Problem 27 Boyle’s law is applicable in Isobaric process Isochoric process Isotonic process Isothermal process
30. Problem 28 A block of steel heated up to 10000c is left in a room to coll. Which of the curves shown in figure represents the correct behavior? A B C All of these
31. Problem 29 Radio telescope is used to see Stars and to measure diameters Distant stars and planets High frequency waves Sun and to measure its temperature
32. Problem 30 According to kinetic theory of gases, the temperature depends upon Root mean square velocity Motion of the molecules Attraction of the molecules Collision of the molecules
33. Problem 31 If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting , what is the focal length of objective 20 cm 100 cm 10 cm 25 cm
34. Problem 32 Magnetic permeability is maximum for Ferromagnetic substance Diamagnetic substance Paramagnetic substance All of these
36. Problem 34 Which of the following is different from others? Frequency Wavelength Amplitude Velocity
37. Problem 35 A body is in equilibrium under the action of three coplanar forces P, Q and R as shown in the figure. Select the correct statement a. b. c. d. Â
38. Problem 36 A body goes 10 km north and 20 km east. What will be displacement of the body from its initial point? 15.16 km 22.36 km 12.21 km 20.21 km
39. Problem 37 The phenomenon of electrolysis was first given by Faraday Arrhenius Joule Kirchhoff
40. Problem 38 The refractive index of water and glass with respect to air is 1.3 and 1.5 respectively. What will be the refractive index of glass with respect to water? a. 1.5/2.6 b. 1.5/1.3 c. 2.6/1.5 d. 1.3/1.5
41. Problem 39 The reciprocal of specific resistance is Conductive reactance Plate resistance Conductive resistance Specific conductance
42. Problem 40 How many images will be formed if two mirrors are fitted on adjacent wall and one mirror on ceiling? 7 2 11 5
43. Problem 41 Ina compound microscope for large magnification size, the length of the eye piece should be Less than objective Equal to objective Of any value Greater than objective
44. Problem 42 A body is dropped from the top of a tower with zero velocity and reaches ground in 4 seconds. The height of the tower is about ( g=10 m/s2) 80 m 20 m 160 m 40 m
45. Problem 43 The amplification of triode is controlled by Anode Grid Cathode All of these
46. Problem 44 The gas present around radioactive material is Ne H Cl2 He
47. Problem 45 The magnetic effect of current was first of all given by Kirchhoff Joule Michael Faraday Forested
48. Problem 46 The frictional force is Vector quantity Self – adjustable Scalar quantity Not self – adjustable
49. Problem 47 Self – induction of a coil is numerically equal to the total magnetic flux linked with it, when a unit Charge passes through it Current passes through it Magnetic field passes through it Voltage passes through it
50. Problem 48 Which of the following is an example of scalar quantity? Angular momentum Velocity Electrostatic potential Force
51. Problem 49 In insulators electricity does not pass because Molecules are not mobile Electrons are not mobile in insulators Electrons are very compact in insulators It shows pressure difference like solids.
52. Problem 50 Which of the following pairs has same dimensions? Stress and strain Pressure and density Momentum and inertia Impulse and momentum
