AMU –PAST PAPERSPHYSICS- UNSOLVED PAPER -2001
SECTION – I   Single Correct Answer Type         There are five parts in this question. Four choices are given for each ...
01   Problem     In a Young’s double slit experiment, the separation on the two slits is doubled.     The keep the same sp...
02   Problem     The Hubble constant has the dimension of :     a. Time     b. (time)-1     c. length     d. mass
03   Problem     The radius of a nucleus of mass number A is directly proportional to :     a. A1/3     b. A2/3     c. A3 ...
04   Problem     A 60 kg man runs up a stair case in 12 second while a 50 kg man runs up the     same stair case in 11 sec...
05   Problem                                                                          Two SHW are represented by the eq...
06   Problem     Where A is the area of cross-section of spring and L is the length of the spring and     E is the Young’s...
07   Problem                               A  4i     j    ˆ          i   j    ˆ          ˆ  4 ˆ  4k and B  3ˆ  ˆ  ...
08   Problem     The deceleration experienced by a moving motor boat, after its engine is cut off              d     is g...
09   Problem     The time displacement curves of two objects A and B are shown in the adjoining     figure then :     a. T...
10   Problem                         The vectors              ˆ    ˆ          ˆ     j ˆ                    P  ai  aj  ...
11   Problem     Consider the following statements :     (i) For a permanent magnet the area of a hysteresis loop can be a...
12   Problem     When pure germanium is doped with pentavalent impurity like phosphorus     the conduction is due to :    ...
13   Problem     Two capacitors of 10 F and 20 F are connected in series with a 30V battery. ?The     charge on the capaci...
14   Problem     Intrinsic semiconductor is electrically neutral, extrinsic semiconductor having     large number of curre...
15   Problem                                              1     The amount of a radio active material   16                ...
16   Problem     An observer sees two particles A and B approaching each other from opposite     direction, each with a sp...
17   Problem     What is the energy equivalence to 1 g of coal ?     a. 9 x 1010 J     b. 8 x 1011 J     c. 9 x 1012 J    ...
18   Problem     A proton and an  -particle are accelerated through the same kinetic energy. The     ratio of their de Br...
19   Problem     The capacitance of spherical conductor is given by :     a. C =   4 0     b. C = 40R        2        ...
20   Problem     In an A.C. circuit the potential difference and current are represented                                  ...
21   Problem     Light of frequency 1.5 times the threshold frequency is incident on photo     sensitive material. If the ...
22   Problem     An electron moving with velocity 2 x 107 m/s describes a circle in a magnetic field     of strength 2 x 1...
23   Problem     The range of wavelength of the visible part of the electro magnetic spectrum is :     a. 8500 – 10000 Å  ...
24   Problem     A TV transmitting tower has height of 160 m. Its covering range, and the height     raised to double its ...
25   Problem     The stopping potential V0 virsus frequency plot of a substance is shown in fig.     The thresold waveleng...
26   Problem     In an A.C. circuit resistance R, inductance L and capacitance C are in parallel. The     value of R is 50...
27   Problem     A conducting circlar loop is placed in a uniform magnetic field of 0.02 tesla with     its palne perpendi...
28   Problem     Two inductors 0.4 H and 0.6 H are connected in parallel. If this combination is     connected in series w...
29   Problem     The relation of magnetic force between two short magnets when they are coaxial     will be :     a. F  ...
30   Problem     the magnetic field at P on the axis of a solenoid having 100 turns / metre and     carrying a current of ...
31   Problem     A cylindrical container is filled with water upto top. It is a square hole of side L at     a depth y fro...
32   Problem     A boy has 60 kg wt. He wants to swim in a river with the help of a wooden log. If     relative density of...
33   Problem     Four particles have speed 1 m/s, 2 m/s, 3 m/s and 4 m/s. The root mean square     velocity of the molecul...
34   Problem     In an isobaric process of an ideal gas. The ratio of heat supplied and work done                        ...
35   Problem     The disc of siren has n holes and the frequency of its rotation is 300 rpm. It     produces a note of wav...
36   Problem     the minimum distance of a sounding body form the hill for heating echo clearly is     : (speed of sound =...
37   Problem     A lens of camera has an aperture of 5 cm and focal length 14 cm . What is the f     number of camera ?   ...
38   Problem     An automobile of mass m is crossing over a concave over bridge with speed . If     radius of bridge is R....
39   Problem     From a water fall, water is falling down at the rate of 500 kg/s on the plates of a     turbine. If the h...
40   Problem     A aeroplane is flying in a horizontal direction with a velocity u and at a height of     2000 m. When it ...
41   Problem     A boat full of iron scrap is floating on water in lake. If all the iron is dropped into     water, the wa...
42   Problem     The terminal potential difference of cell when short circuited, is :     a. E          E     b.   2     c...
43   Problem     A charged particle moving in a magnetic field is increased in its velocity, then its     radius of the ci...
44   Problem     An electron revolves 6 x 1015 time per second in a circular orbit. The current in     the loop is :     a...
45   Problem     The value of Faradays constant is :     a. 9.65 x 104 coulomb     b. 9.65 x 104 coulomb     c. 6.03 x 102...
46   Problem     If the coefficient of linear expansion of a solid is 0.00009, its coefficient of volume     expansion is ...
47   Problem     Soldering of two metals is possible because of the property of :     a. Viscosity     b. Surface tension ...
48   Problem     When a triode is used as an amplifier the phase difference between the input     signal voltage and outpu...
49   Problem     For Balmer series that lies in the visible region, the shortest wavelength     corresponds to quantum num...
50   Problem     A double convex lens ( = 3/2) of focal length 20 cm is totally immersed in water (     = 4/3). Its focal ...
FOR SOLUTIONS VISIT WWW.VASISTA.NET
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AMU - Physics - 2001

  1. 1. AMU –PAST PAPERSPHYSICS- UNSOLVED PAPER -2001
  2. 2. SECTION – I 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. 3. 01 Problem In a Young’s double slit experiment, the separation on the two slits is doubled. The keep the same spacing of fringes, the distance D of the screen from the screen from the slits would be made : a. 2D b. D D c. 2 D d. 4
  4. 4. 02 Problem The Hubble constant has the dimension of : a. Time b. (time)-1 c. length d. mass
  5. 5. 03 Problem The radius of a nucleus of mass number A is directly proportional to : a. A1/3 b. A2/3 c. A3 d. A3/2
  6. 6. 04 Problem A 60 kg man runs up a stair case in 12 second while a 50 kg man runs up the same stair case in 11 seconds. The ratio of the rate of doing their work will be : a. 10 : 11 b. 11 : 10 c. 6 : 5 d. 5 : 6
  7. 7. 05 Problem   Two SHW are represented by the equation y 1  10 sin  3 t   m y2  5(sin3 t  3 cos 3 t ) 4  their amplitude ratio, and phase difference are respectively :  a. 1 : 1, 12 b. 2 : 3,  3 c. 3 : 4,  4 2 d. 2 : 1, 7
  8. 8. 06 Problem Where A is the area of cross-section of spring and L is the length of the spring and E is the Young’s modulus of the material of the spring then time period and force constant of the spring will be respectively : a. EA L T  2 ,k  ML EA b. 1 EA A T  ,k  2 ML EL 1 EA EA c. T  ,k  2 ML L ML EA d. T  2 ,k  EA L
  9. 9. 07 Problem   A  4i j ˆ i j ˆ ˆ  4 ˆ  4k and B  3ˆ  ˆ  4k then angle between vectors is : a. 1800 b. 900 c. 450 d. 00
  10. 10. 08 Problem The deceleration experienced by a moving motor boat, after its engine is cut off d is given  kv 3 where k is constant and is the magnitude of the velocity dt at time t after the cut off is : a. 0 c  kt 0 b. 20 kt  1 2 c. 0 0 d. 2
  11. 11. 09 Problem The time displacement curves of two objects A and B are shown in the adjoining figure then : a. The graph does not give information b. Both A and B have same velocity c. The velocity of A is greater than B d. The velocity of A is less than B
  12. 12. 10 Problem  The vectors ˆ ˆ ˆ j ˆ P  ai  aj  3k and Q  ai  2 ˆ  k ˆ are perpendicular to each other. The positive value of ‘a’ is ; a. 13 b. 9 c. 4 d. 3
  13. 13. 11 Problem Consider the following statements : (i) For a permanent magnet the area of a hysteresis loop can be allowed to be large (ii) Coercivity of the material in permanent magnets should be small a. (i) but not (ii) b. (ii) but not (i) c. both (i) and (ii) d. neither (i) or (ii)
  14. 14. 12 Problem When pure germanium is doped with pentavalent impurity like phosphorus the conduction is due to : a. Position b. Protons c. Holes d. Electrons
  15. 15. 13 Problem Two capacitors of 10 F and 20 F are connected in series with a 30V battery. ?The charge on the capacitors will be respectively : a. 100 μC, 100 μC b. 200 μC, 100 μC c. 200 μC, 200 μC d. 100 μC, 200 μC
  16. 16. 14 Problem Intrinsic semiconductor is electrically neutral, extrinsic semiconductor having large number of current carriers would be : a. Electrically neutral b. Positively charged or negatively charged depending upon the type of impurity that has been added c. The positively charged d. Negatively charged
  17. 17. 15 Problem 1 The amount of a radio active material 16 th of its initial value in 28 days. Its mean life is approximately : a. 3.5 days b. 10 days c. 5 days d. 7 days
  18. 18. 16 Problem An observer sees two particles A and B approaching each other from opposite direction, each with a speed 0.8 C. The speed of particle B relative to A will be : a. 0.975 C b. 0.875 C c. 9.75 C d. 97.5 C
  19. 19. 17 Problem What is the energy equivalence to 1 g of coal ? a. 9 x 1010 J b. 8 x 1011 J c. 9 x 1012 J d. 9 x 1013 J
  20. 20. 18 Problem A proton and an  -particle are accelerated through the same kinetic energy. The ratio of their de Broglie wavelength is : a. 4 : 1 b. 2 : 1 c. 1 : 1 d. 2 :1
  21. 21. 19 Problem The capacitance of spherical conductor is given by : a. C = 4 0 b. C = 40R 2 1 c. C = 4 0 R d. C = 4 0 R
  22. 22. 20 Problem In an A.C. circuit the potential difference and current are represented   respectively by V = 100 sin (100t) volt i = 100 sin 100t  3  milliamperes. The   power in the circuit is : a. 2.5 watt b. 5 watt c. 10 watt d. 104 watt
  23. 23. 21 Problem Light of frequency 1.5 times the threshold frequency is incident on photo sensitive material. If the frequency is halved and intensity is doubled. The photoelectron becomes : a. Halved b. Quadrupled c. Zero d. Doubled
  24. 24. 22 Problem An electron moving with velocity 2 x 107 m/s describes a circle in a magnetic field of strength 2 x 10-2 tesla. If e/m of electron is 1.76 x 1011 C/kg. Then the diameter of the circle will be : a. 11 cm b. 1.1 cm c. 1.1 mm d. 1.1m
  25. 25. 23 Problem The range of wavelength of the visible part of the electro magnetic spectrum is : a. 8500 – 10000 Å b. 7000 – 8500 Å c. 3000 – 4000 Å d. 4000 – 7000 Å
  26. 26. 24 Problem A TV transmitting tower has height of 160 m. Its covering range, and the height raised to double its covering range, will be respectively : a. 45 km, 640 m b. 50 km, 700 m c. 40 km, 600 m d. none of these
  27. 27. 25 Problem The stopping potential V0 virsus frequency plot of a substance is shown in fig. The thresold wavelength is : a. Cannot be estimated from given data b. 5 x 1014 cm c. 500 Å d. 6000 Å
  28. 28. 26 Problem In an A.C. circuit resistance R, inductance L and capacitance C are in parallel. The value of R is 50 , inductive reactance XL = 40  and capacitive reactance XC = 25  . Then the reading of ammeter will be: a. 10.2 A b. 5 A c. 17 A d. 7 A
  29. 29. 27 Problem A conducting circlar loop is placed in a uniform magnetic field of 0.02 tesla with its palne perpendicular to the magnetic field. If the radius of the loop starts striking at a constant rate of 1 mm/s. Then the emf induced in the loop at the instant when the radius is a 4 cm will be : a. 8μ V b. 5.0 μ V c. 2.0 μ V d. 2.5 μ V
  30. 30. 28 Problem Two inductors 0.4 H and 0.6 H are connected in parallel. If this combination is connected in series with an inductor of inductance 0.76 H. The equivalent inductance of the circuit will be : a. 0.1 H b. 0.2 H c. 1 H d. 2 H
  31. 31. 29 Problem The relation of magnetic force between two short magnets when they are coaxial will be : a. F  0 3M1M2 2 4 r 0 3M1M2 b. F  4H r 4 1 6M1M2 c. 40 r4 0 6M1M2 d. 4 r4
  32. 32. 30 Problem the magnetic field at P on the axis of a solenoid having 100 turns / metre and carrying a current of 5 A is : a. 250 0 b. 500 2 0 c. 500 0 d. 250 2
  33. 33. 31 Problem A cylindrical container is filled with water upto top. It is a square hole of side L at a depth y from the top. Also there is a circular hole of radius R = L at a depth 2y from the top. Then the ratio of quantities of liquid flowing out through the two holes : 2 a.  1 b. 2 1 c. 2 1 d. 2
  34. 34. 32 Problem A boy has 60 kg wt. He wants to swim in a river with the help of a wooden log. If relative density of wood is 0.6. What is the minimum volume of wooden log ? (density of river water is 1000 kg/m3) a. 0.66 m3 b. 150 m3 3 c. 1 m3 3 d. m3 20
  35. 35. 33 Problem Four particles have speed 1 m/s, 2 m/s, 3 m/s and 4 m/s. The root mean square velocity of the molecule is : a. 2.74 m/s b. 2 m/s c. 1.37 m/s d. 5.48 m/s
  36. 36. 34 Problem In an isobaric process of an ideal gas. The ratio of heat supplied and work done  Q  by the system  i.e.,   is :  W  a.   1 r b.   c.   1 d. 1
  37. 37. 35 Problem The disc of siren has n holes and the frequency of its rotation is 300 rpm. It produces a note of wavelength 2.4 m. When the velocity of sound in air is 360 m/s. The value of n is : a. 24 b. 36 c. 5 d. 30
  38. 38. 36 Problem the minimum distance of a sounding body form the hill for heating echo clearly is : (speed of sound = 34 m/s) a. 270 m b. 8.5 m c. 34 m d. 17 m
  39. 39. 37 Problem A lens of camera has an aperture of 5 cm and focal length 14 cm . What is the f number of camera ? a. 19 5 b. 14 c. 2.8 d. 70
  40. 40. 38 Problem An automobile of mass m is crossing over a concave over bridge with speed . If radius of bridge is R. The thrust on the bridge at the lowest point will be : m 2 a. Mg + R m 2 b. mg - R c. Mg m 2 d. R
  41. 41. 39 Problem From a water fall, water is falling down at the rate of 500 kg/s on the plates of a turbine. If the height of the fall is 50 m, then the power delivered to the turbine is nearly equal to : a. 2.5 kW b. 250 kW c. 10 kW d. 25 kW
  42. 42. 40 Problem A aeroplane is flying in a horizontal direction with a velocity u and at a height of 2000 m. When it is vertically below a point a on the ground at point B. If AB = 3 km and g = 10 m/s2. The value of u is : a. 300 km/hr b. 150 km/hr c. 540 km/hr d. 54 km/hr
  43. 43. 41 Problem A boat full of iron scrap is floating on water in lake. If all the iron is dropped into water, the water level of water : a. Go up b. Remain the same c. Rise very high d. Go very
  44. 44. 42 Problem The terminal potential difference of cell when short circuited, is : a. E E b. 2 c. E 3 d. zero
  45. 45. 43 Problem A charged particle moving in a magnetic field is increased in its velocity, then its radius of the circle : a. Decreases b. Increases c. Remain same d. Becomes half
  46. 46. 44 Problem An electron revolves 6 x 1015 time per second in a circular orbit. The current in the loop is : a. 0.96 mA b. 0.96  A c. 28.8 A d. none of these
  47. 47. 45 Problem The value of Faradays constant is : a. 9.65 x 104 coulomb b. 9.65 x 104 coulomb c. 6.03 x 1027 coulomb d. 1.6 x 10-19 coulomb
  48. 48. 46 Problem If the coefficient of linear expansion of a solid is 0.00009, its coefficient of volume expansion is : a. 0.0009 b. 0.00018 c. 0.00027 d. 0.0003
  49. 49. 47 Problem Soldering of two metals is possible because of the property of : a. Viscosity b. Surface tension c. Osmosis d. Cohesion
  50. 50. 48 Problem When a triode is used as an amplifier the phase difference between the input signal voltage and output is : a. Zero b.   c. 2  d. 3
  51. 51. 49 Problem For Balmer series that lies in the visible region, the shortest wavelength corresponds to quantum number : a. n =1 b. n = 2 c. n=3 d. n = 
  52. 52. 50 Problem A double convex lens ( = 3/2) of focal length 20 cm is totally immersed in water ( = 4/3). Its focal length now will be : a. 20 cm b. 80 cm c. 40 cm d. 10 cm
  53. 53. FOR SOLUTIONS VISIT WWW.VASISTA.NET

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