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31st July 2014, 11:33 AM
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| Re: Prasar bharti exam sample paper
As you are saying that you wan to take part in Prasar Bharati Engineering Assistant exam in near future so here I am providing sample paper for you: 1. Which one of the following physical quantities, is not defined in the terms of force per unit area: (a) pressure (b) strain (c) stress (d) Young’s modulus Ans:b 2. The distance moved by a moving body is equal to: (a) area between the distance-time graph and distance axis (b) area between the speed-time graph and time axis (c) area between the distance-time graph and time axis (d) area between the speed-time graph and distance axis. Ans:b 3. A beaker containing water weighs 100 gm. It is placed on the pan of a balance and a piece of metalweighing 70 gm. and having a volume of 10cc. is placed inside the water in the beaker. The weight of the beaker and the metal would be : (a) 170gm. (c) 100gm. (b)160gm. (d)30gm. Ans:a 4. For the same kinetic energy, the momentum shall be maximum for: (a) electron (b) proton (c) deuteron (d) alpha particle Ans:d 5. The common balance works on the principle of equality of: (a) forces (b) moments of forces (c) masses (d) masses of pans Ans:b 6. A particle moves in a circle of radius R with a constant speed under a centripetal force F. The work done in completing a full circle is: (a) 2RF (b) ΠR2F (c) 2ΠRF (d)Zero Ans:d 7. When two quantities are plotted on the graph paper against each other and the result so obtained is a st. line, then (a) Both the quantities are equal (b) The quantities are inversely proportional to each other (c) Sum of both is zero (d) The quantities are proportional to each other Ans:d 8. What is the order of magnitude of 260°? (a)103 (b) 104 (c)102 (d) 10 Ans:c 9. The maximum value of g is: (a) At the poles (b) At the top of the Mount Everest (c) At the equator (d) Below the sea level Ans:a 10. A fixed volume of gas at 27°C exerts a pressure of 750 mm. If the gas is heated to a pressure of 1500mm., temperature must be: (a) 600°C (b) 327°C (c) 54°C (d) 13.5°C Ans:b 11. A body of mass 2 kg acted upon by a constant force, travels a distance of 3 metres in the first second and a further distance of meter in the next second. The force acting on the body is? (a) 12 Newtons (b) 8 Newtons (c) 4 Newtons (d) 1 Newton Ans:c 12. Two forces each equal to P acting at a point have no resultant. The angle between the two forces must be equal to: (a)180° (b) 90° (c)0° (d) 120° Ans:a 13. A jet engine works on the principle of: (a) conservation of energy (b) conservation of momentum (c) conservation of mass (d) conservation of temperature Ans:b 14. A sharp knife cuts much better than a blunt one because? (a) Area of sharp knife is much less than the area of the blunt one (b) sharp knife is brighter (c) sharp knife is colder (d) sharp knife is costly Ans:a 15. A man carries a heavy box on his head on a horizontal plane from one place to another. In this he does? (a) maximum work (b) no work (c) negative work (d) minimum work Ans:b 16. The bob of a second’s pendulum is replaced by another bob of double mass. The new time period will be: (a) 4 sec. (c) 2 sec. (b) 1 sec (d) 3 sec. Ans:c 17.A device for measuring temperatures at a distance is (a) gas thermometer (b) mercury thermometer (c) radiation (d) maximum-minimum thermometer Ans:c 18. A piece of ice is floating in a concentrated solution of common salt (in water) in a pot. When ice melts completely, the level of solution will: (a) go up (b) remain the same (c) go down (d) first go up then go down Ans:a 19. A radioactive source has a half-life of 30 days. During a period of 90 days the fraction of atoms that have decayed would be (a)100% (b) 87.5% (c)64% (d) 50% Ans:b 20. A black body emits: (a) radiations of all wavelengths (b) no radiations (c) radiations of only one wavelength (d) radiations of selected wavelengths Ans:a 21. A near sighted person cannot see distinctly beyond 50 cm. from his eye. The power in diopter of spectacle lenses which will enable him to see distant objects clearly is (a) +50 (b) —50 (c) +2 (d) —2 Ans:c 22. Size of a nucleus is of the order of? (a)10-18m (b) 10-14m (c)10-10m (d) 10-6m Ans:b 23. The freezing point on a thermometer is marked as 20° and the boiling point as 150°C. A temperature of 60°C on this thermometer will be read as: (a)40° (b) 65° (c)98° (d) 110° Ans:c 24. In isothermal expansion of an ideal gas: (a) heat content remains constant (b) temperature remains constant (c) both heat content and temperature remain constant (d) pressure and temperature of the gas remain constant Ans:b 25. A man standing between two cliffs hears the first echo of a sound after 2 sec. and the second echo 3 sec. after the initial sound. If the speed of sound be 330 m/sec. the distance between the two cliffs should be (a)1650 m. (b)990 m. (c)825 m (d) 660 m. Ans:c 26. In a resonance tube experiment the first resonance is obtained for 10 cm. of air column and the second for 32 cm. The end correction for this apparatus is equal to? (a)0.5 cm (b)1.0 cm (c)1.5 cm Downloaded From Edufever.com Downloaded From Edufever.com (d) 2 cm Ans:b 27. The ratio of the specific heat of air at constant pressure to its specific heat at constant volume is? (a) zero (b) greater than one (c) less than one (d) equal to one Ans:b 28. A convex lens has a focal length of 10 cm. When it is immersed in water it will behave as? (a) a convex tens of 10 cm. focal length (b) a concave lens of 10 cm. focal length (c) a convex lens of focal length greater than 10cm. (d) a convex lens of focal length less than 10 cm. Ans:c 29. Two particles having charges q1 and q2 when kept at a certain distance exert a force F on each other. If the distance between the two particles is reduced to half and the charge on each particle is doubled the force between the particles would be ? (a)2F (b)4F (c)8F (d)16F Ans:d 30. A small magnet is placed perpendicular to a constant magnetic field. The forces acting on the magnet will result in? (a) rotation (b) translation (c) no motion at all (d) rotation as well as translation Ans:a 31. A hollow metallic sphere is charged. Inside the sphere? (a) the potential is zero but the electric field is finite (b) the electric field is zero but the potential is finite (c) both the electric field and the potential are finite (d) both the electric field and the potential are zero Ans:b 32. Two electric lamps each of 100 watts 220 V are connected in series to a supply of 220 volts. The power consumed would be: (a)100 Watts (b) 200 Watts (c)25 Watts (d) 50 Watts Ans:d 33. A transformer is: (a) a device for stepping up D.C. Downloaded From Edufever.com Downloaded From Edufever.com (b) a generator of current (c) device for converting direct current into alternating current (d) a device for stepping up or down the voltage of A.C. supply Ans:d 34. Transistor act as a? (a) conductor (b) semi-conductor (c) insulator (d) thermionic valve Ans:d 35. The sky is blue because: (a) there is more blue light in the sunlight (b) of scattering of sunlight by air molecules in the atmosphere (c) of scattering of sunlight by dust particles in the atmosphere (d) other colours are absorbed by heavenly bodies Ans:b 36. A cyclonic storm is indicated by a change in the atmospheric pressure. In atmospheric pressure there is a: (a)sudden rise (b) gradual rise (c)sudden fall (d) gradual fall Ans:c 37. The electric field inside a hollow conducting sphere will ? (a) increases towards the centre (b) decreases towards the centre (c) is finite and constant throughout (d) is zero Ans:d 38. Imperfect gases are those: (a) which contain impurities (b) which do not obey Charle’s and Boyle’s laws (c) whose molecules are not spherical (d) whose molecules cannot be regarded as point masses Ans:b 39. Sonar is a device for: (a) location and ranging of aircraft’s (b) location and ranging submarines (c) producing a musical note of high quality (d) measuring frequency of musical notes Ans:b 40. Cyclotron is a device to produce: (a) atomic energy (b) high energy electrons Downloaded From Edufever.com Downloaded From Edufever.com (c) high energy photons (d) high energy protons Ans:d 41. Which one of the following is not a vector? (a) Velocity (b) Acceleration (c) Force (d) Energy Ans:d 42. Two steel balls of mass 1 kg. and 2kg. and a lead ball of 10kg. are released together from the top of tower 30 metres high. Assuming the path to be in vacuum (a) the lead ball reaches the ground earlier (b) the 1 kg. steel bail reaches the ground earlier (c) all the balls reach the ground simultaneously (d) the 2 kg. steel ball reaches the ground earlier Ans:c 43. After a watch has been wound, it? (a) has great energy stored in it (b) possesses mechanical potential energy stored in it (c) has eletrical energy stored in it (d) has no energy in it Ans:b 44. Two plane mirrors are set at right angles and a flower is placed in any position in between the mirrors. The number of images of the flower which will be seen is? (b) two (d) four (a) one (c) three Ans:c 45. In which of the following cases total internal reflection cannot be obtained? (a) ray going from water to glass (b) a ray going from glass to water (c) a ray going from glass to air (d) a ray going from water to air. Ans:a 46. When white light passes through a glass prism, we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is (a) the violet ray (b) the red ray (c) the green ray (d) the yellow ray Ans:b 47. Magnetic storms are due to (a) the rotation of the earth (b) the revolution of the earth (c) the rainy season (d) the appearance off Sun spots Ans:d 48. For dynamo which one of the following statements is correct ? (a) It converts the electrical energy into light energy (b) It converts the kinetic energy into heat energy (c) It converts the mechanical energy into electrical energy (d) Jt converts the electrical energy into mechanical energy. Ans:c 49. In a transformer the immediate cause of the induced A. C. in the secondary coil is? (a) a varying electric field (b) a varying magnetic field (e) a motion of the secondary coil (d) efficiency of the operator Ans:b 50.A dynamo actually acts as a? (a) converter of energy (b) source of electric charge (c) source of magnetic charge (d) source of energy Ans:a Q.1.Which one of the following physical quantities, is not defined in the terms of force per unit area: pressure strain stress Young’s modulus Q.2.The distance moved by a moving body is equal to: area between the distance-time graph and distance axis area between the speed-time graph and time axis area between the distance-time graph and time axis area between the speed-time graph and distance axis. Q.3.A beaker containing water weighs 100 gm. It is placed on >the pan of a balance and a piece of metal weighing 70 gm. and having a volume of 10cc. is placed inside the water in the beaker. The weight of the beaker and the metal would be : 170gm. 100gm. 160gm. 30gm. Q.4.For the same kinetic energy, the momentum shall be maximum for: electron proton deuteron alpha particle Q.5.The maximum value of g is: At the poles At the top of the Mount Everest At the equator Below the sea level Q.6.The common balance works on the principle of equality of: forces moments of forces masses masses of pans Q.7.A body of mass 2 kg acted upon by a constant force, travels a distance of 3 meters in the first second and a further distance of meter in the next second. The force acting on the body is? 12 Newtons 8 Newtons 4 Newtons 1 Newton Q.8.A particle moves in a circle of radius R with a constant speed under a centripetal force F. The work done in completing a full circle is: 2RF 1/2RF 2/RF Zero Q.9.When two quantities are plotted on the graph paper against each other and the result so obtained is a st. line, then Both the quantities are equal The quantities are inversely proportional to each other Sum of both is zero The quantities are proportional to each other Q.10.What is the order of magnitude of 260°? 103 104 102 10 Q.11.A fixed volume of gas at 27°C exerts a pressure of 750 mm. If the gas is heated to a pressure of 1500mm., temperature must be: 600°C 327°C 54°C 13.5°C Q.12.A sharp knife cuts much better than a blunt one because? Area of sharp knife is much less than the area of the blunt one sharp knife is brighter sharp knife is colder sharp knife is costly Q.13.Two forces each equal to P acting at a point have no resultant. The angle between the two forces must be equal to: 180° 90° 0° 120° Q.14.A device for measuring temperatures at a distance is gas thermometer mercury thermometer radiation maximum-minimum thermometer Q.15.A jet engine works on the principle of: conservation of energy conservation of momentum conservation of mass conservation of temperature Q.16.A black body emits: radiations of all wavelengths no radiations radiations of only one wavelength radiations of selected wavelengths Q.17.A man carries a heavy box on his head on a horizontal plane from one place to another. In this he does? maximum work no work negative work minimum work Q.18.In isothermal expansion of an ideal gas: heat content remains constant temperature remains constant both heat content and temperature remain constant pressure and temperature of the gas remain constant Q.17.The bob of a second’s pendulum is replaced by another bob of double mass. The new time period will be: 4 sec. 2 sec. 1 sec 3 sec. Q.18.Size of a nucleus is of the order of? 10-18m 10-14m 10-10m 10-6m Q.19.The ratio of the specific heat of air at constant pressure to its specific heat at constant volume is? zero greater than one less than one equal to one Q.20.In a resonance tube experiment the first resonance is obtained for 10 cm. of air column and the second for 32 cm. The end correction for this apparatus is equal to? 0.5 cm 1.0 cm 1.5 cm 2 cm Q.21.A piece of ice is floating in a concentrated solution of common salt (in water) in a pot. When ice melts completely, the level of solution will: go up remain the same go down first go up then go down Q.22.A radioactive source has a half-life of 30 days. During a period of 90 days the fraction of atoms that have decayed would be 100% 87.5% 64% 50% Q.23.Two particles having charges q1 and q2 when kept at a certain distance exert a force F on each other. If the distance between the two particles is reduced to half and the charge on each particle is doubled the force between the particles would be ? 2F 4F 8F 16F Q.24.A near sighted person cannot see distinctly beyond 50 cm. from his eye.The power in diopter of spectacle lenses which will enable him to see distant objects clearly is +50 —50 +2 —2 Q.25.The freezing point on a thermometer is marked as 20° and the boiling point as 150°C. A temperature of 60°C on this thermometer will be read as: 40° 65° 98° 110° Q.26.A hollow metallic sphere is charged. Inside the sphere? the potential is zero but the electric field is finite the electric field is zero but the potential is finite both the electric field and the potential are finite both the electric field and the potential are zero Q.27.A man standing between two cliffs hears the first echo of a sound after 2 sec. and the second echo 3 sec. after the initial sound.If the speed of sound be 330 m/sec. the distance between the two cliffs should be 1650 m. 990 m. 825 m 660 m.0 Q.28.Transistor act as a? conductor semi-conductor insulator thermionic valve Q.29.Sonar is a device for: location and ranging of aircraft’s Location and ranging submarines producing a musical note of high quality measuring frequency of musical notes Q.30.A convex lens has a focal length of 10 cm. When it is immersed in water it will behave as? a convex tens of 10 cm. focal length a concave lens of 10 cm. focal length a convex lens of focal length greater than 10cm. a convex lens of focal length less than 10 cm. Q.31.A small magnet is placed perpendicular to a constant magnetic field. The forces acting on the magnet will result in? rotation translation no motion at all rotation as well as translation Q.32.Two electric lamps each of 100 watts 220 V are connected in series to a supply of 220 volts. The power consumed would be: 100 Watts 200 Watts 25 Watts 50 Watts Q.33.Cyclotron is a device to produce: atomic energy high energy electrons high energy photons high energy protons Q.34.A transformer is: a device for stepping up D.C. a generator of current device for converting direct current into alternating current a device for stepping up or down the voltage of A.C. supply Q.35.Two steel balls of mass 1 kg. and 2kg. and a lead ball of 10kg. are released together from the top of tower 30 metres high. Assuming the path to be in vacuum the lead ball reaches the ground earlier the 1 kg. steel bail reaches the ground earlier all the balls reach the ground simultaneously the 2 kg. steel ball reaches the ground earlier Q.36.The electric field inside a hollow conducting sphere will ? increases towards the centre decreases towards the centre is finite and constant throughout is zero Q.37.The sky is blue because: there is more blue light in the sunlight of scattering of sunlight by air molecules in the atmosphere of scattering of sunlight by dust particles in the atmosphere other colors are absorbed by heavenly bodies Q.38.Magnetic storms are due to the rotation of the earth the revolution of the earth the rainy season the appearance off Sun spots Q.39.A cyclonic storm is indicated by a change in the atmospheric pressure.In atmospheric pressure there is a: sudden rise gradual rise sudden fall gradual fall Q.40.Imperfect gases are those: which contain impurities which do not obey Charle’s and Boyle’s laws whose molecules are not spherical whose molecules cannot be regarded as point masses Q.41.Which one of the following is not a vector? Velocity Acceleration Force Energy Q.42.In which of the following cases total internal reflection cannot be obtained? ray going from water to glass a ray going from glass to water a ray going from glass to air a ray going from water to air. Q.43.After a watch has been wound, it? has great energy stored in it possesses mechanical potential energy stored in it has electrical energy stored in it has no energy in it Q.44.For dynamo which one of the following statements is correct ? It converts the electrical energy into light energy It converts the kinetic energy into heat energy It converts the mechanical energy into electrical energy Jt converts the electrical energy into mechanical energy. Q.45.Two plane mirrors are set at right angles and a flower is placed in any position in between the mirrors. The number of images of the flower which will be seen is? two four one three Q.46.A dynamo actually acts as a? converter of energy source of electric charge source of magnetic charge source of energy Q.47.When white light passes through a glass prism, we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is the violet ray the red ray the green ray the yellow ray Q.48.In a transformer the immediate cause of the induced A. C. in the secondary coil is? a varying electric field a varying magnetic field a motion of the secondary coil efficiency of the operator Prasar bharti exam paper pattern   |