#1
6th August 2014, 08:12 AM
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All India Radio (Engineering Assistants) post exam previous year question papers
Will you please share with me the All India Radio (Engineering Assistants) post exam previous year question papers?
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#2
6th August 2014, 09:06 AM
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Re: All India Radio (Engineering Assistants) post exam previous year question papers
As you want to get the All India Radio (Engineering Assistants) post exam previous year question papers so here it is 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 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 : (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) ?R2F (c) 2?RF (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 (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. (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 (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 |
#3
29th May 2015, 02:19 PM
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Re: All India Radio (Engineering Assistants) post exam previous year question papers
Hi I want the question paper of All India Radio (Engineering Assistants) post exam so can you provide me?
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#4
29th May 2015, 02:19 PM
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Re: All India Radio (Engineering Assistants) post exam previous year question papers
Ok, as you want the question paper of All India Radio (Engineering Assistants) post exam so here I am providing you. All India Radio Engineering Assistants exam question paper 1. A current carrying coil is subjected to a uniform magnetic field. The coil will orient so that its plane becomes ? (a) inclined at 45° to the magnetic field (b) inclined at any arbitrary angle to the magnetic field (c) parallel to the magnetic field (d) perpendicular to magnetic field Ans:c 2. Tesla is the unit of (a) magnetic flux (b) magnetic field (c) magnetic induction (d) magnetic moment Ans:b 3. Energy in a current carrying coil is stored in the form of ? (a) electric field (b) magnetic field (c) dielectric strength (d) heat Ans:b 4. The total charge induced in a conducting loop when it is moved in magnetic field depends on? (a) the rate of change of magnetic flux (b) initial magnetic flux only (c) the total change in magnetic flux (d) final magnetic flux only. Ans:c 5. The magnetic induction at a point P which is at the distance of 4 cm from a long current carrying wire is 10-3 T. The field of induction at a distance 12 cm from the current will be ? (a) 3.33 x 10-4 T (b) 1.11x 10-4 T (c) 3×10-3 T (d) 9×10-3 T Ans:a 6. A charge moving with velocity v in X-direction is subjected to a field of magnetic induction in negative X-direction. As a result, the charge will (a) remain unaffected (b) start moving in a circular path in Y—Z plane (c) retard along X-axis (d) moving along a helical path around X-axis Ans:a 7. A uniform magnetic field acts right angles to the direction of motion of electrons. As a result, the electron moves in a circular path of radius 2cm. If the speed of electrons is doubled, then the radius of the circular path will be ? (a)2.0 cm (b) 0.5 cm (c)4.0cm (d) 1.0cm Ans:c 8. A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is (a)25 keV (b) 50 keV (c)200 keV (d) 100 keV Ans:d 9. A straight wire of length 0.5 metre and carrying a current of 1.2 ampere is placed in uniform magnetic field of induction 2 Tesla. The magnetic field is perpendicular to the length of the wire. The force on the wire is ? (a) 2.4N (b) 1.2N (c) 3.0 N (d) 2.0 N Ans:b 10. To convert a galvanometer into an ammeter, one needs to connect a ? (a) low resistance in parallel (b) high resistance in parallel (c) low resistance in series (d) high resistance in series. Ans:a 11. A coil carrying electric current is placed in uniform magnetic field (a) torque is formed (B) e.m.f is induced (c) both (a) and (b) are correct (d) none of the above Ans:a 12. The magnetic field at a distance ‘r’ from a long wire carrying current ‘i’ is 0.4 Tesla. The magnetic field at a distance ‘2r’ is ? (a)0.2Tesla (b) 0.8 Tesla (c)0.1 Tesla (d) 1.6 Tesla Ans:a 13. A electron enters a region where magnetic (B) and electric (E) fields are mutually perpendicular, then ? (a) it will always move in the direction of B (b) it will always move in the direction of E (c) it always possesses circular motion (d) it can go un deflected also. Ans:d 14. A straight wire of diameter 0.5 mm carrying a current of 1 A is replaced by another wire of I mm diameter carrying same current. The strength of magnetic field far away is? (a) twice the earlier value (b) same as the earlier value (c) one-half of the earlier value (d) one-quarter of the earlier value Ans:b 15. At what distance from a long straight wire carrying a current of 12 A will the magnetic field be equal to 3×10-6 Wb/metre Square (a) 8×10-2 m (b) 12×10-2 m (c)18x 10-2 m (d) 24×10-2 m Ans:a 16. An electron moves in a circular orbit with a uniform speed v. It produces a magnetic field B at the centre of the circle. The radius of the circle is proportional to ? (a) v(B/v) (b) B/v (c) v(v/B) (d)v/B Ans:d 17. A 10 eV electron is circulating in a plane at right angles to a uniform field at magnetic induction 10-4 Wb/m2 (= 1.0 gauss). The orbital radius of the electron is ? (a) 12cm (b) 16cm (c) 11cm (d) 18cm Ans:c 18. A galvanometer acting as a voltmeter will have? (a) a low resistance in series with its coil. (b) a high resistance in parallel with its coil (c) a high resistance in series with its coil (d) a low resistance in parallel with its coil Ans:c 19. A beam of electrons is moving with constant velocity in a region having simultaneous perpendicular electric and magnetic fields of strength 20 Vm-1 and 0.5 T respectively at right angles to the direction of motion of the electrons. Then the velocity of electrons must be? (a) 8m/s (b) 20 m/s (c) 40m/s (d) 1/40 m/s Ans:c 20. A galvanometer of resistance 20 Ohms gives full scale deflection with a current of 0.004 A. To convert it into an ammeter of range 1 A, the required shunt resistance should be? (a) 0.38 Ohms (b) 0.21 Ohms (c) 0.08 Ohms (d) 0.05 Ohms Ans:c 21. A long solenoid carrying a current produces a magnetic field B along its axis. If the current is doubled and the number of turns per cm is halved, the new value of the magnetic field is ? (a) 4B (b) B/2 (c) B (d) 2B Ans:c 22. A positively charged particle moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will (a) continue to move due east (b) move in a circular orbit with its speed unchanged (c) move in a circular orbit with its speed increased (d) gets deflected vertically upwards. Ans:b 23. Two long parallel wires are at a distance of 1 metre. Both of them carry one ampere of current The force of attraction per unit length between the two wires is? (a)2 x10-7 N/m (b) 2 x10-8 N/m (c) 5×10-8 N/m (d)10-7 N/m Ans:a 24. A galvanometer having a resistance of 8 ohms is shunted by a wire of resistance 2 ohms. If the total current is 1 amp, the part of it passing through the shunt will be? (a)0.25 amp (b) 0.8 amp (c)0.2 amp (d) 0.5 amp Ans:b 25. A coil of one turn is made of a wire of certain length and then from the same length a coil of two turns is made. If the same current is passed in both the cases, then the ratio of the magnetic inductions at their centres will be? (a)2:1 (b)1:4 (c)4:1 (d)1:2 Ans:b 26. Magnetic field intensity in the centre of coil of 50 turns, radius 0.5 m and carrying a current of 2A is ? (a) 0.5 x 10-5 T (b) 1.25x 10-4 T (c) 3x 10-5 T (c) 4 x 10-5 T Ans:b 27. When a proton is accelerated through I V, then its kinetic energy will be? (a)1840 eV (b) 13.6eV (c)1 eV (d) 0.54eV Ans:c 28. If a long hollow copper pipe carries a current,thin magnetic field is produced (a)inside the pipe only (b)outside the pipe only (c)both inside and outside the pipe (d) no where Ans:b 29. A charged particle moves through a magnetic field in a direction perpendicular to it. Then the (a) velocity remains unchanged (b) speed of the particle remains unchanged (c) direction of the particle remains unchanged (d) acceleration remains unchanged Ans:b 30. Two long parallel wires P and Q are both perpendicular to the plane of the paper with distance of 5 m between them. If P and Q carry current of 2.5 amp and 5 amp respectively in the same direction, then the magnetic field at a point half-way between the wires is ? (a)3µ/2? (b)µ/? (c)v3µ/2? (d)µ/2? Ans:a 31. A proton moving with a velocity 3 x 105 m/s enters a magnetic field of 0.3 Tesla at an angle of 30° with the field. The radius of curvature of its path will be (e/m for proton – 108 C/kg) (a)2cm (b) 0.5 cm (c)0.02 cm (d) 1.25 cm Ans:b 32. A charged particle of charge q and mass m enters perpendicularly in a magnetic field B. Kinetic energy of the particle is E; then frequency of rotation is? (a)qB/m? (b) qB/2m? (c)qBE/2m? (d) qB/2E? Ans:b 33. A galvanometer can be converted into a voltmeter by connecting? (a) A high resistance in parallel (b) A low resistance in series (c) A high resistance in series (d) A low resistance in parallel Ans:c 34. A wire carries a current. Maintaining the same current it is bent first to form a circular plane coil of one turn which produces a magnetic field B at the centre of the coil. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre of the double loop, caused by the same current is ? (a)4B (b) B /4 (c) B/2 (d) 2B Ans:a 35.A bar magnet is oscillating in earth’s magnetic field with a period T. What happens to its period of motion, if its mass is quadruped ? (a) Motion remains simple harmonic with new period =T/2 (b) Motion remains simple harmonic with new period = 2 T (c) Motion remains simple harmonic with new period =4T (d) Motion remains simple harmonic and the period stays nearly constant Ans:b 36. The work done in turning a magnet of magnetic moment M by an angle of 90° from the meridian, is n times the corresponding work done to turn it through an angle of 60°. The value of n is given by (a)2 (b) 1 (c) 0.5 (d) 0.25 Ans:a 37 . For protecting a sensitive equipment from the external electric arc, it should be ? (a) Wrapped with insulation around it when passing current through it (b) Placed inside an iron can (c) Surrounded with fine copper sheet (d) Placed inside an aluminium can Ans:b 38. If a diamagnetic substance is brought near north or south pole of a bar magnet, it is? (a) attracted by the poles (b) repelled by the poles (c) repelled by north pole and attracted by the south pole (d) attracted by the north pole and repelled by the south pole Ans:b 39. Current i is flowing in a coil of area A and number of turns N, then magnetic moment of the coil is M= ? (a) NiA (b) Ni/A (c)Ni/vA (d) N2Ai Ans:a 40. Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with the identical poles in the same direction. The time period of vibration is T1. If the magnets are placed with opposite poles together and vibrate with time period T2 then ? (a) T2 is infinite (b) T2=T1 (c)T2>T1 (d) T2 is less than T1 Ans:c 41. A diamagnetic material in a magnetic field moves (a) perpendicular to the field (b) from stronger to the weaker pans of the field (c) from weaker to the stronger parts of the field (d) in none of the above directions Ans:b |
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