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ASSAM-CEE PATTERN (PHYSICS) FACULTY: MONI KAKATI
1. The maximum value of index of refraction a material of prism which allows the passage of light
through it when the refracting angle of the prism is A is:
(a)
+
2sin1 2 A
(b)
+
2cos1 2 A
(c)
+
2tan1 2 A
(d)
+
2cot1 2 A
2. If the refracting angle of the prism is 600 and minimum deviation is 30
0, what will be the angle of
incidence?
(a) 300 (b) 60
0
(c) 450 (d) 90
0
3. A tank is filled with water to height 1m.The apparent shift of bottom is 0.1m. What will be the
refractive index of water?
(a) 9/10 (b) 10/9
(c) 11/9 (d) 9/11
4. A point source of light is placed 4m below the surface of water of refractive index 5/3.The minimum
diameter of a disc, which should be placed over the source , on the surface of water to cut off all light
coming out of water, is
(a) ∞ (b) 6m
(c) 4m (d) 3m
5. An air bubble in a glass slab (µ= 1.5) is 6 cm deep as viewed from one face and 4 cm deep as viewed
from the other face. The thickness of the glass slab is
(a) 10cm (b) 6.67 cm
(c) 15 cm (d) None of these
6. If the refractive index of water is 4/3 and that of a given slab of glass immersed in it is 5/3, what will
be the critical angle of incidence for a ray of light tending to go from glass to water
(a) sin-1
(5/4) (b) sin –1
(3/5)
(c) sin-1
(4/5)
(d) it cannot be determined form the given data
7. A vessel is half filled with a liquid of refractive index µ. The other half of the vessel is filled with an
immiscible liquid of refractive index 1.5 µ. The apparent depth of vessel is 50% of the actual depth, µ
is
(a) 1.6 (b) 1.67
(c) 1.5 (d) 1.4
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8. A beam of light is converging towards a point I on a screen. A plane parallel plate of glass whose
thickness in the direction of the beam = t, refractive index = µ, is introduced in the path of the beam.
The convergence point is shifted by
(a)
−
µ
11.t away (b)
+
µ
11.t away
(c)
−
µ
11.t nearer (d)
+
µ
11.t nearer
9. White light is used to illuminate the two slits in a Young’s double-slit experiment. The separation
between the slits is b and the screen is at a distance d ( >> b ) from the slits. At a point on the screen
directly in front of one of the slits, certain wavelengths are missing. Some of the missing wavelengths
are
(a) d
b 2
=λ (b) d
b 22=λ
(c) d
b
6
2
=λ (d) d
b
3
2 2
=λ
10. A beam of light of wavelength 600 nm from a distant source falls on a single slit 1.00mm wide and the
resulting diffraction pattern is observed on a screen 2m away. The distance between the first dark
fringes on either side of the central bright fringe is
(a) 1.2 cm (b) 1.2 mm
(c) 2.4 cm (d) 2.4 mm
11. In an N – P – N transistor 1010
electrons enter the emitter in 10 –6
s. 2% of the electrons are lost in the
base. The current received by the collector is
(a) 1.6 mA (b) 0.032 mA
(c) 1.632 mA (d) 1.568 mA
12. A Carnot engine, having an efficiency of η = 1/10 as heat engine, is used as a refrigerator. If the work
done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
(a) 99 J (b) 90 J
(c) 1 J (d) 100 J
13. Which of the following transitions in hydrogen atoms emit photons of highest frequency?
(a) n = 2 to n = 6 (b) n = 6 to n = 2
(c) n = 2 to n = 1 (d) n = 1 to n = 2
14. A sound absorber attenuates the sound level by 20dB. The intensity decreases by a factor of
(a) 1000 (b) 10000
(c) 10 (d) 100
15. A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C
and is charged to potential V volts. The dielectric slab is slowly removed from between the plates and
then reinserted. The net work done by the system in this process is
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(a) 2)1(
2
1CVK − (b) )1(
2
−KK
CV
(c) 2)1( CVK − (d) zero
16. A circular disc of radius R is removed from a bigger circular disc of radius 2R such that the
circumferences of the discs coincide. The centre of mass of the new disc is α/R from the centre of the
bigger disc. The value of α is
(a) 1/3 (b) 1/2
(c) 1/6 (d) ¼
17. In a Young’s double slit experiment the intensity at a point where the path difference is λλ
,6
being the
wavelength of the light used) is0I
I. If I0 denotes the maximum intensity, is equal to
(a) 2
1 (b)
2
3
(c) 2
1 (d)
4
3
18. A particle is moving eastwards with a velocity of 5m/s in 10s the velocity changes to 5m/s
northwards. The average acceleration in this time is
(a) 2
1m/s
2 towards north-east
(b) 2
1 m/s
2 towards north
(c) Zero (d) 2
1 towards north-west
19. A body A of mass M while falling vertically downwards under gravity breaks into two parts; a body B
of mass 1/3 M and a body C of mass 2/3 M. The centre of mass of bodies B and C taken together
shifts compared to that of body A towards
(a) depends on height of breaking
(b) does not shift
(c) body C (d) body B
20. If x, v and a denote the displacement, the velocity and the acceleration of a particle executing simple
harmonic motion of time period T, then, which of the following does not change with time?
(a) 2222 4 vTa π+ (b) x
aT
(c) vaT π2+ (d) v
aT
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21. One kg of a diatomic gas is at a pressure of 8X104N/m
2. The density of the gas is 4 kg/m
–3. What is
the energy of the gas due to its thermal motion?
(a) 3 × 104 J (b) 5 × 10
4 J
(c) 6 × 104 J (d) 7 × 10
4 J
22. A working transistor with its three legs marked P, Q and R is tested using a multimeter. No
conduction is found between P and Q. By connecting the common (negative) terminal of the
multimeter to R and the other (positive) terminal to P or Q, some resistance is seen on the multimeter.
Which of the following is true for the transistor?
(a) It is a pnp transistor with R as emitter
(b) It is an npn transistor with R as collector
(c) It is an npn transistor with R as base
(d) It is a pnp transistor with R as collector
23. A block of mass 0.50 kg is moving with a speed of 2.00 ms–1
on a smooth surface. It strikes another
mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is
(1) 0.67 J (2) 0.34 J
(3) 0.16 J (4) 1.00 J
24. Two coaxial solenoids are made by winding thin insulated wire over a pipe of cross sectional area A =
10 cm2 and length = 20 cm. If one of the solenoids has 300 turns and the other 400 turns, their mutual
inductance is
(a) H5108.4 −×π (b) H4104.2 −×π
(c) H5104.2 −×π (d) H4108.4 −×π
25. Two identical cells each of emf E and internal resistance r are connected in parallel with an external
resistance R. To get maximum power developed across R, the value of R is
(a) R = r/2 (b) R = r
(c) R = r/3 (d) R = 2r
26. An alternating current of rms value 10 A is passed through a 12Ω resistor. The maximum potential
difference across the resistor is
(a) 20 V (b) 90 V
(c) 1969.68 V (d) none
27. A bullet is fired with velocity u making an angle of 600 with the horizontal. The horizontal component
of velocity at maximum height is
(a) u (b) zero
(c) u2
3 (d)
2
u
28. The poisson’s ratio of a material is 0.5. If a force is applied to a wire of this material, there is a
decrease in the cross-sectional area by 4%. The percentage increase in the length is :
(a) 1 % (b) 2%
(c) 2.5% (d) 4%
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29. A spring of force constant k is cut into two equal halves. The force constant of each half is
(a) 2
k (b) k
(c) 2
k (d) k2
30. Two rods of equal length and diameter have thermal conductivities 3 and 4 units respectively. If they
are joined in series, the thermal conductivity of the combination would be
(a) 3.43 (c) 3.5
(b) 3.4 (d) 3.34
31. 19 g of water at 30°C and 5g of ice at –20°C are mixed together in a calorimeter. What is the final
temperature of the mixture?
Given specific heat of ice = 0.5 cal g–1
(°C)–1
and latent heat of fusion of ice = 80 cal g–1
(a) 0° C (b) – 5° C
(c) 5° C (d) 10° C
32. The distance between an object and a divergent lens is m times the focal length of the lens. The linear
magnification produced by the lens is
(a) m (b) m
1
(c) m + 1 (d) 1
1
+m
33. At a certain place, the horizontal component of earth’s magnetic field is 3 times the vertical
component. The angle of dip at that place is
(a) 30° (b) 60°
(c) 45° (d) 90°
34. A galvanometer coil has a resistance of 10 Ω and the meter shows full scale deflection for a current of
1mA. The shunt resistance required to convert the galvanometer into an ammeter of range 0-100mA is
about
(a) 10 Ω (b) 1 Ω
(c) 0.1 Ω (d) 0.01 Ω
35. A p-n photodiode is fabricated from a semiconductor with band gap of 2.8 eV. Which of the following
wavelengths it can detect?
(a) 950 nm (b) 820 nm
(c) 580 nm (d) 440 nm
36. An n-p-n transistor having a.c. current gain of 50 is to be used to make an amplifier of power gain of
300.
What will be the voltage gain of the amplifier?
(a) 8.5 (b) 6
(c) 4 (d) 3
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37. A point mass m is placed inside a spherical shell of radius R and mass M at a distance 2
Rfrom the
center of the shell. The gravitational force exerted by the shell on the point mass is
(a) 2
R
GMm (b)
2R
GMm−
(c) zero (d) 2
4
R
GMm
38. Two stars of mass 1m and 2m are parts of a binary star system. The radii of their orbits are 1r and 2r
respectively, measured from the C.M. of the system. The magnitude of gravitational force 1m exerts
on 2m is
(a) 2
21
21
)( rr
Gmm
+ (b)
221
1
)( rr
Gm
+
(c) 2
21
2
)( rr
Gm
+ (d)
221
21
)( rr
mm
+
+
39. Two cylinders of equal size are filled with equal amount of ideal diatomic gas at room temperature.
Both the cylinders are fitted with pistons. In cylinder A the piston is free to move, while in cylinder B
the piston is fixed. When same amount of heat is supplied to both the cylinders, the temperature of the
gas in cylinder A raises by 20°K. What will be the rise in temperature of the gas in cylinder B?
(a) 28°K (b) 20°K
(d) 15°K (c) 10°K
40. A block is lying static on the floor. The maximum value of static frictional force on the block is 10 N.
If a horizontal force of 8 N is applied to the block, what will be the frictional force on the block?
(a) 2 N (b) 18 N
(c) 8 N (d) 10 N
41. Two simple harmonic motions are represented by ]2cos32[sin51 tty ππ += and
+=
42sin52
ππty .
The ratio of their amplitudes is
(a) 1:1 (b) 2:1
(c) 1:3 (d) 3 :1
42. A block is lying static on the floor. The maximum value of static frictional force on the block is 10 N.
If a horizontal force of 8 N is applied to the block, what will be the frictional force on the block?
(a) 2 N (b) 18 N
(c) 8 N (d) 10 N
43. If the cold junction of a thermo-couple is kept at 0°C and the hot junction is kept at T°C then the
relation between neutral temperature ( nT ) and temperature of inversion ( iT ) is
(a) nT = 2 iT (b) nT = iT – T
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(c) nT = iT + T (d) nT = iT /2
44. A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated
magnetic moment µ is given by
(a) qvR2 (b) qvR
2/2
(c) qvR (d) qvR/2
45. Monochromatic light of frequency 6.0 × 1014
Hz is produced by a laser. The power emitted is 2 × 10–3
W. The number of photons emitted, on the average, by the sources per second is
(a) 5 × l 016
(b) 5 × 1017
(c) 5 × 1014
(d) 5 × 1015
46. A steady current of 1.5A flows through a copper voltameter for 10 minutes. If the electrochemical
equivalent of copper is 30 × 10–5
g coulomb–1
, the mass of copper deposited on the electrode will be
(a) 0.50 g (b) 0.67 g
(c) 0.27 g (d) 0.40 g
47. Two satellites of earth, S1 and S2 are moving in the same orbit. The mass of S1 is four times the mass
of S2. Which one of the following statements is true?
(a) The potential energies of earth satellites in the two cases are equal.
(b) S1 and S2 are moving with the same speed.
(c) The kinetic energies of the two satellites are equal.
(d) The time period of S1 is four times that of S2
48. The electric and magnetic field of an electromagnetic wave are
(a) in opposite phase and perpendicular to each other
(b) in opposite phase and parallel to each other
(c) in phase and perpendicular to each other
(d) in phase and parallel to each other
49. The mass of a 73Li nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding
energy per nucleon of 73Li nucleus is nearly:
(a) 46 MeV (b) 6 MeV
(c) 3.9 MeV (d) 23 MeV
50. The displacement of a particle along the x-axis is given by x = a sin2ωt. The
motion of the particle corresponds to:
(a) simple harmonic motion of frequency ω/π
(b) simple harmonic motion of frequency 3ω/2π
(c) non simple harmonic motion
(d) simple harmonic motion of frequency ω/2π
51. A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B). The fields are
adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by
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(a) 2
2
2VE
B (b)
2
22
E
VB
(c) 2
22
B
VE (d)
2
2
2VB
E
(Where V is the potential difference between cathode and anode)
52. A ball is dropped from a high rise platform at t = 0 starting from rest. After 6 seconds another ball is
thrown downwards from the same platform with a speed v. The two balls meet at t = 18 s. What is the
value of v? (take g = 10 m/s2)
(a) 75 m/s (b) 55 m/s
(c) 40 m/s (d) 60 m/s
53. The period of oscillation of a mass M suspended from a spring of negligible mass is T. If along with it
another mass M is also suspended, the period of oscillation will now be:
(a) T (b) T⁄ 2
(c) 2T (d) 2 T
54. An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a
velocity of 2 m/s. The mass per unit length of water in the pipe is 100 kg/m. What is the power of the
engine?
(a) 400 W (b) 200 W
(c) 100 W (d) 800 W
55. A thin ring of radius R meter has charge q coulomb uniformly spread on it. The ring rotates about its
axis with a constant frequency of f rev/s. The value of magnetic induction in Wb/m2 at the centre of
the ring is:
(a) R
fq
..2
.0
π
µ (b)
Rf
q
..2
0
π
µ
(c) Rf
q
..2
0µ (d)
R
fq
.2
.0
π
µ
56. A conducting circular loop is placed in a uniform magnetic field, B=0.025T with its plane
perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of 1 mm/s. The
induced e.m.f. when the radius is 2cm, is:
(a) π2 Vµ (b) π Vµ
(c) 2
πVµ (d) 2 Vµ
57. Two particles which are initially at rest move towards each other under the action of their internal
attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system
will be:
(a) 2 v (b) Zero
(c) 1.5 v (d) v
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58. A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string of a piano. The
beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased.
The frequency of the piano string before increasing the tension was:
(a) 510 Hz (b) 514 Hz
(c) 516 Hz (d) 508 Hz
59. A gramophone record is revolving with an angular velocity ω. A coin is placed at a distance r from the
centre of the record. The static coefficient of friction is µ. The coin will revolve with the record if
(a) 2.. ωµ gr = (b) g
r.
2
µ
ω<
(c) 2
.
ω
µ gr ≤ (d)
2
.
ω
µ gr ≥
60. The energy of a hydrogen atom in the ground state is − 13.6 eV. The energy of a He+ ion in the first
excited state will be:
(a) − 13.6 eV (b) − 27.2 eV
(c) − 54.4 eV (d) − 6.8 eV
61. The dimension of 20
2
1Eε , where ε0 is permittivity of free space and E is electric field, is:
(a) ML2 T
− 2 (b) ML
− 1 T
− 2
(c) ML2 T
− 1 (d) MLT
− 1
62. In a vessel a hole is made at a depth of 3.2 m from the surface. The velocity of efflux will be
(a) 9 m/s (b) 8 m/s
(c) 7 m/s (d) 6 m/s
63. The diameter of a pipe at the point 1 is 6 cm, while at point 2 it is 2 cm. The velocity of water at point
1 is 2 m/s. The velocity at the point 2 is
(a) 6m/s (b) 9m/s
(c) 90m/s (d) 18m/s
64. A cube of wood floating in water supports a 200 g mass resting on the centre of its top face. When the
mass is removed, the cube rises 2 cm. Determine the volume of the cube.
(a) 1000 cm3 (b) 2000 cm
3 (c) 1 m
3 (d) 100 cm
3
65. A cable is shortened to half its original length. The maximum load it can support without exceeding its
elastic limit will
(a) remain the same
(b) 1/2 the original value
(c) twice the original value
(d) cannot be stated definitely
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66. A metal bar has length L, area of cross−section A, young’s modulus Y. It is placed between rigid
walls with distance L between the walls. When it is heated through t°C it exerts a force given by (α =
co−efficient of linear expansion)
(a) Y α LT (b) Y α L2t
(c) Y A α t (d) Y α t/A
67. Adiabatic elasticity of a gas is equal to
(a) γ × (density) (b) r
(c) γ × (final pressure) (d) γ × (cp)
68. If the change in the value of g at height h above the surface of the earth is the same as at a depth x
below it (both h and x being much smaller than earth’s radius) then,
(a) 2
hx = (b) x = h
(c) 2
3hx = (d) x = 2h
69. A body of mass m accelerates uniformly from rest to a speed u in a time T. The instantaneous power
delivered to the body as a function of time t is given by
(a) tT
um2.
2
1 (b) t
T
um
2
2.
2
1
(c) tT
um
2
2. (d) 2
2
2.t
T
um
70. A hollow metallic sphere filled with water is used as bob of a simple pendulum. If the sphere has a
small hole in the bottom through which the water is leaking continuously, the time period of the
pendulum will
(a) gradually go on increasing
(b) gradually go on decreasing
(c) remain unchanged
(d) gradually go on increasing initially and will decrease later when the sphere is empty
71. Sand is dropping from a stationery hopper on to a conveyer belt at a rate given by dt
dM, the force
required to keep the belt moving at a constant speed v is
(a) dt
dMv
2 (b) dt
dM
v
1
(c) dt
dM
v2
1 (d)
dt
dMv
72. Two bodies of unequal masses moving with velocity V1 and V2 have same kinetic energy. The ratio of
their linear momentum is
(a) V1/V2 (b) V2/V1
(c) /VV 21 (d) /VV 12
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73. A wheel is rotating at the rate of 33rev/min. If it comes to a stop in 20sec, the angular acceleration is
(a) 2/200
.11srad
π− (b) 2/
200
.srad
π
(c) π.11 2/ srad (d) zero
74. A semi-conductor is cooled from T1 K to T2 K.
Its resistance:
(a) Will decrease (b) Will Increase
(c) Will first decrease and then increase
(d) Will not change.
75. A potentiometer consists of a wire of length 400cm and a resistance 10Ω. It is connected to a cell of
e.m.f. 2 volt having negligible internal resistance. Calculate the potential difference per unit length of
the wire :
(a) 50 volt m-1
(b) 0.5 volt m-1
(c) 50 volt m-1
(d) None
76. Four identical thin rods each of mass M and length l, form a square frame. Moment of inertia of this
frame about an axis through the centre of the square and perpendicular to its plane is
(a) Ml2/3 (b) 4Ml
2/3
(c) 2Ml2/3 (d) 13Ml
2/3
77. A boat having a speed of 5 km/hr. in still water crosses a river of width 1 km along the shortest
possible path in 15 minutes. The speed of the river in km/hr.
(a) 1 (b) 3
(c) 4 (d) 41
78. A perfect gas is found to obey the relation 2/3PV = constant, during an adiabatic process. If such a
gas, initially at a temperature T, is compressed adiabatically to half its initial volume, then its final
temperature will be
(a) 2T (b) 4T
(c) √2T (d) 2√2T
79. If l1 and l2 are the lengths of air column for the first and second resonance when a tuning fork of
frequency n is sounded on a resonance tube, then the distance of the displacement anti node from the
top end of the resonance tube is:
(a) )(2 12 ll − (b) )2(2
112 ll −
(c) 2
3 12 ll − (d)
2
12 ll −
80. The particle executing simple harmonic motion has a kinetic energy Kocos2ωt. The maximum values
of the potential energy and the total energy are respectively :
(a) Ko and Ko (b) 0 and 2Ko
(c) Ko/2 and Ko (d) Ko and 2Ko
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81. Under the influence of the Coulomb field of charge +Q, a charge –q is moving around it in an
elliptical orbit. Find out the correct statement (s)
(a) the angular momentum of the charge .q is constant
(b) the linear momentum of the charge .q is constant
(c) the angular velocity of the charge .q is constant
(d) the linear speed of the charge .q is constant
82. Which one of following statements is Wrong in the context of X-rays generated from a X- ray tube ?
(a) Wavelength of characteristic X-rays decreases when the atomic number of the target increases
(b) Cut-off wavelength of the continuous X-rays depends on the atomic number of the target
(c) Intensity of the characteristic X-rays depends on the electrical power given to the X-ray tube
(d) Cut-off wavelength of the continuous X-rays depends on the energy of the electrons in the X-ray
tube
83. An ideal gas is expanding such that 2PT = constant. The coefficient of volume expansion of the gas is
(a) T
1 (b)
T
2
(c) T
3 (d)
T
4
84. A piece of wire is bent in the shape of a parabola y=kx2 (y-axis vertical) with a bead of mass m on it.
The bead can slide on the wire without friction. It stays at the lowest point of the parabola when the
wire is at rest. The wire is now accelerated parallel to the x-axis with a constant acceleration a. The
distance of the new equilibrium position of the bead, where the bead can stay at rest w.r.t. the wire,
from the y-axis is
(a) gk
a (b)
gk
a
2
(c) gk
a2 (d)
gk
a
4
85. Electrons with de-Broglie wavelength λ fall on the target in an X-ray tube. The cut-off wavelength of
the emitted X-rays is
(a) h
mc 2
0
2 λλ = (b)
mc
h20 =λ
(c) 2
322
0
2
h
cm λλ = (d) λλ =0
86. A particle moves in the X-Y plane under the influence of a force such that its linear momentum is
)]sin(ˆ)cos(ˆ[)( ktjktiAtp −= , where A & k are constants. The angle between the force and the
momentum is
(a) 0° (b) 30°
Career Point, Guwahati Centre, G.S. Road, Bora Service Bye-Lane, Guwahati
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(c) 45° (d) 90°
87. The radius of the rear wheel of bicycle is twice that of the front wheel. When the bicycle is moving,
the angular speed of the rear wheel compared to that of the front is
(a) Greater (b) Smaller
(c) Same (d) Exact double
88. What is the particle x in the following nuclear reaction:
xCHeBe +→+ 126
42
94
(a) electron (b) proton
(c) Photon (d) Neutron
89. Ar
and Br
are two vectors given by jiA ˆ3ˆ2 +=r
and jiB ˆˆ +=r
. The magnitude of the component of Ar
along Br
is
(a) 2
5 (b)
2
3
(c) 2
7 (d)
2
1
90. It is difficult to cook rice in an open vessel by boiling it at high altitudes because of
(a) low boiling point and high pressure
(b) high boiling point and low pressure
(c) low boiling point and low pressure
(d) high boiling point and high pressure
91. If the charge on a capacitor is increased by 2 coulomb, the energy stored in it increases by 21%. The
original charge on the capacitor is
(a) 10 C (b) 20 C
(c) 30 C (d) 40 C
92. Gamma rays are
(a) high energy electrons
(b) low energy electrons
(c) high energy electro-magnetic waves
(d) high energy positrons
93. On an unbanked road, a cyclist negotiating a bend of radius r at velocity v leans inwards by an angle:
(a)
−
gr
v
2tan
21 (b)
−
gr
v21tan
(c)
−
v
rg1tan (d)
−
gr
v1tan
Career Point, Guwahati Centre, G.S. Road, Bora Service Bye-Lane, Guwahati
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94. The force between two parallel wires is 2 × 10–7
N/m, spaced 1 m apart to each another in vacuum.
The electric current flowing through the wires is:
(a) unit ampere (b) zero
(c) 5 × 106 ampere (d) 2 × 10
–7 ampere
95. A heater of 220 V heats a volume of water in 5 minutes time. A heater of 110 V heats the same
volume of water in:
(a) 5 minutes (b) 8 minutes
(c) 10 minutes (d) 20 minutes
96. A force of 40 N is acting between two charges in air. If the space between them is filled with glass of
K = 8, what will be the force.
(a) 5 N (b) 15 N
(c) 200 N (d) 40 N
97. A force is inclined at 60° to the horizontal. If its rectangular component in the horizontal direction is
50 N, then magnitude of the force in the vertical direction is –
(a) 25 N (b) 75 N
(c) 87 N (d) 100 N
98. The reciprocal of bulk modulus of a substance is called its:
(a) compressibility (b) rigidity
(c) viscosity (d) modulus of elasticity
99. A semi-circular arc of radius ‘a’ is charged uniformly and the charge per unit length is λ. The electric
field at its centre is:
(a) 2
02 aπε
λ (b)
a04ε
λ
(c) a0
2
2πε
λ (d)
a02πε
λ
100. The penetrating powers of α, β and γ radiations, in decreasing order are:
(a) γ, α, β (b) γ, β, α
(c) α, β, γ (d) β, γ , α
Career Point, Guwahati Centre, G.S. Road, Bora Service Bye-Lane, Guwahati
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ANSWER KEY
1. d
2. c
3. b
4. d
5. c
6. c
7. b
8. a
9. a
10. d
11. d
12. b
13. c
14. d
15. d
16. a
17. d
18. d
19. b
20. b
21. b
22. c
23. a
24. b
25. a
26. c
27. d
28. d
29. d
30. a
31. c
32. d
33. a
34. c
35. d
36. b
37. c
38. a
39. a
40. c
41. b
42. d
43. d
44. d
45. d
46. c
47. b
48. c
49. b
50. a
51. d
52. a
53. d
54. a
55. d
56. b
57. b
58. d
59. c
60. a
61. b
62. b
63. d
64. a
65. a
66. c
67. c
68. a
69. c
70. d
71. d
72. b
73. a
74. b
75. b
76. b
77. b
78. c
Career Point, Guwahati Centre, G.S. Road, Bora Service Bye-Lane, Guwahati
Ph | 0361-2466191 | 98643-42927 | 94351-01613
IIT-JEE | AIEEE | AIEEE |Assam-CEE | CLASS XI | CLASS XII
79. c
80. a
81. a
82. b
83. c
84. b
85. a
86. d
87. b
88. d
89. a
90. c
91. b
92. c
93. b
94. a
95. d
96. a
97. c
98. a
99. b
100. b
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