Physics Questions For Nda 46
Physics Questions For Nda 46
Physics Questions For Nda 46
co
A. 12.5 cm
B. 5 cm
C. 2 cm
D. 10 cm
A. 1, 2 and 3
B. 1 and 3 only
C. 2 and 3 only
D. 1 and 2 only
4.Two metallic wires A and B are made using copper. The radius of wire A
is r while its length is l. A de voltage V is applied across the wire A,
causing power dissipation, P. the radius of wire B is 2r and its length is 2l
and the same de voltage V is applied across it causing power dissipation
P1. Which one of the following is the correct relationship between P and
P1?
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A. P = 2P1
B. P = P1/2
C. P = 4P1
D. P = P1
A. Max Planck
B. Albert Einstein
C. Neils Bohr
D. Ernest Rutherford
A. Nuclear fusion
B. Controlled nuclear fusion
C. Uncontrolled nuclear fission
D. Controlled nuclear fission
7.Let us consider a copper wire having radius r and length l. Let its
resistance be R. If the radius of another copper wire is 2r and the length
is l/2 then the resistance of this wire will be
A. R
B. 2R
C. R/4
D. R/8
A. 25oC
B. 37oC
C. 500oC
D. 1500oC
A. 330 m/s
B. 800 m/s
C. 1500 m/s
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D. 5000 m/s
A. Current electricity
B. Static electricity
C. Magnetic field
D. Gravitational field
13.Which one of the following energy is stored in the links between the
atoms?
A. Nuclear energy
B. Chemical energy
C. Potential energy
D. Thermal energy
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16.When a beam of white light passes through a glass prism, the colour
of light beam that deviates the least is _________.
A. Blue
B. Red
C. Green
D. Violet
A. 32
B. 22
C. 98
D. 42
18.‘Black hole’ is a
A. huge black star which has zero acceleration due to gravity on its
surface
B. star which has moderate acceleration due to gravity on its surface
C. star which has collapsed into itself and has large acceleration due to
gravity on its surface.
D. star which has collapsed into itself and has zero acceleration due to
gravity on its surface
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A. The walls of flask are separated by vacuum and made of glass which is
a poor conductor of heat
B. The glass walls themselves have shiny surfaces
C. The surface of inner wall radiates good amount of heat and the surface
of outer wall absorbs some of the heat that is radiated from the inner wall
D. The cork supports are poor conductors of heat
20.
In the given velocity (V) versus time (t) graph, accelerated and
decelerated motions are respectively represented by line segments
A. CD and BC
B. BC and AB
C. CD and AB
D. AB and CD
A. 103 g cm/s2
B. 10-3 g cm/s2
C. 105 kg m/s2
D. 10-5 kg m/s2
22.
The figure shown above gives the time (t) versus position (x) graphs of
three objects A, B and C. Which one of the following is the correct relation
between their speeds VA, VB and VC respectively at any instant (t > 0)?
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A. VA < VB < VC
B. VA > VB > VC
C. VA = VB = VC ≠ 0
D. VA = VB = VC = 0
23.The sun is seen before it rises and for a short while after it sets. This is
because of
24.Suppose there are two planets, 1 and 2, having the same density but
their radii are R1 and R2 respectively, where R1 > R2. The accelerations
due to gravity on the surface of these planets are related as
A. g1 > g2
B. g1 < g2
C. g1 = g2
D. Can’t say anything
25.A thin disc and a thin ring, both have mass M and radius R. Both
rotate about axes through their centre of mass and are perpendicular to
their surfaces at the same angular velocity. Which of the following is
correct?
A. Thermal conduction
B. Thermal convection
C. Thermal radiation
D. Both thermal conduction and radiation
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27.When does a ball bounce off the ground, which of the following
changes suddenly?
A. Its speed
B. Its momentum
C. Its kinetic energy
D. Its potential energy
29.A solid disc and a solid sphere have the same mass and same radius.
Which one has a higher moment of inertia about its centre of mass?
A. The disc
B. The sphere
C. Both have the same moment of inertia
D. The information provided is not sufficient to answer the question
A. 6, 2
B. 3, 5
C. 12, 4
D. 9, 3
A. Ohm's law.
B. Conservation of change.
C. Conservation of momentum.
D. Conservation of energy.
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32.A student measures certain lengths using a meter scale having least
count equal to 1mm. Which one of the following measurements is more
precise?
A. 0.50 mm
B. 29.07 cm
C. 0.925 m
D. 910 mm
33.If the work done on the system or by the system is zero, which one of
the following statements for a gas kept at a certain temperature is
correct?
A. 4000 cal
B. 550 cal
C. 1050 cal
D. 1200 cal
1) Supply voltage.
A. 1, 2 and 3
B. 1 and 2 only
C. 1 only
D. 2 and 3 only
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A. 16 F
B. 1 F
C. 4 F
D. None of the above
A. light only.
B. light and long-wavelength infrared.
C. light and short-wavelength infrared.
D. both short and long-wavelength infrared.
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A. 1, 2, 3, and 4
B. 1, 2 and 4 only
C. 2 and 3 only
D. 3 and 4 only
42.A car starts from Bengaluru, goes 50 km in a straight line towards the
south, immediately turns around and returns to Bengaluru. The time
taken for this round trip is 2 hours the magnitude of the average velocity
of the car for this round trip.
A. is 0.
B. is 50 km/hr.
C. is 25 km/hr.
D. cannot be calculated without knowing acceleration.
The total electrical resistance in the given part of the electric circuit is
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A.
B.
C. 15 ohm
D.
A.
B.
C.
D. T
45.Light rays move in straight lines. But through an optical fibre, they can
move in any type of zigzag path because
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D.
A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
A. 318 K
B. 45 K
C. 62.8 K
D. 335.8 K
A. higher speed.
B. higher frequency.
C. longer wavelength.
D. both higher speed and frequency.
50.A ball thrown by one player reaches the other in 2 seconds. The
maximum height attained by the ball above the point of the projection will
be
A. 4 m
B. 5 m
C. 2.5 m
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D. 6 m
A. Zero
A. 256 J
B. 486 J
C. 524 J
D. 324 J
A. 2L
B. 4L
C.
D.
54.If the radius of the earth were to shrink by 1%, its mass remaining the
same, the acceleration due to gravity on the earth’s surface would
A. Decrease by 2%
B. Remain unchanged
C. Increase by 2%
D. Increase by 1%
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55.A projectile can have the same range R for two angles of projection. If
T1 and T2 be the time of flights, then the products T1T2 is directly
proportional to
A.
B.
C.
D.
56.A cricket ball of mass 250 g collides with a bat with velocity 10 m/s
and returns with the same speed within 0.01 s. the force acted on the bat
is.
A. 25 N
B. 50 N
C. 250 N
D. 500N
57.Two bodies of mass 3 kg and 4kg are suspended at the ends of mass
less string passing over a frictionless pulley. The acceleration of the
system is (take g= 9.8 m/s2)
A. 4.9 m/s2
B. 2.45 m/s2
C. 1.4 m/s2
D. 9.5 m/s2
58.A drum of radius R and mass M, rolls down without slipping along an
inclined plane of angle θ. The frictional force
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A. 0
B.
C.
D. None of these
A. 1.26 m
B. 16.2 m
C. 20 m
D. 17.5 m
61.A solid cylinder of mass M and radius R rolls without slipping down an
inclined plane of length L and height h. What is the speed of its centre of
mass when the cylinder reaches its bottom?
A.
B.
C.
D. None of these
62.which of the following astronomer first proposed that the sun is static
and the earth revolves round the sun?
A. Galileo
B. Kepler
C. Copernicus
D. Tyen Brahe
63.if the distance between the earth and the sun were half its present
value, the number of days in a year would have been
A. 64.5
B. 129
C. 182.5
D. 730
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64.In steel, the Young’s Modulus and the strain at the breaking point
are N/m2 and 0.15 respectively. The stress at the breaking point
for steel is
A. N/m2
B. 1.33 N/m2
C. N/m2
D. N/m2
65.Two drops of equal radius coalesce to form a bigger drop. What is the
ratio of surface energy of bigger drop to smaller one?
A.
B. 1:1
C.
D. None of these
66.A liquid does not wet the sides of a solid, if the angle of contact is
A. 0
B. Obtuse
C. Acute
D. Right angle
A. 0.1
B. 0.2
C. 0.001
D. 0.002
A. 1:16
B. 1:8
C. 1:4
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D. 8:1
A. Diatomic
B. Triatomic
C. A mixture of monoatomic and diatomic
D. Monoatomic
70.Three objects coloured black, gray and white can withstand hostile
conditions up to 2800∘C. These objects are thrown into a furnace where
each of them attains a temperature of 2000∘C. Which object will glow
brightest?
71.If vm is the speed of sound in moist air and vd is the speed of sound in
dry air under identical conditions of pressure and temperature, then
A. Vm > vd
B. Vm < vd
C. Vm = vd
D. Vm.vd = 1
A. 0.01 s
B. 10 s
C. 0.1 s
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D. 100 s
74.A satellite moves in an elliptical orbit about a planet. Its maximum and
minimum velocities of the satellite are 30,000 m/s and 1000 m/s
respectively. What is the minimum distance of the satellite from the
planet if the maximum distance is km?
A. km
B. km
C. km
D. None of these
75.A planet has a mass M1 and radius R1. The value of acceleration due to
gravity on its surface is g1. There is another planet 2, whose mass and
radius both are two times that of the first planet. Which one of the
following is the acceleration due to gravity on the surface of planet 2?
A. g1
B. 2g1
C. g1/2
D. g1/4
1) Both the eyepiece and the objective of a microscope are convex lenses.
2) The focal length of the objective of a telescope is larger than the focal
length of its eyepiece
A. 1 and 3 only
B. 1 and 4
C. 2, 3 and 4
D. 1, 2 and 3
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77.The graphs between current (I) and voltage (V) for three linear
resistors 1,2 and 3 are given below :
If R1, R2 and R3 are the resistances of these resistors, then which one of
the following is correct?
A. R1 > R2 > R3
B. R1 < R3 < R2
C. R3 > R1 > R2
D. R3 < R2 < R1
A. T
B. 2T
C. 4T
D. T/2
3) The energy of UV light photons is less than that of visible light photons.
A. 1, 2 and 3
B. 1 and 2 only
C. 2 and 3 only
D. 1 only
Which one of the following is the value of the resistance between points A
and B in the circuit given above?
A.
B.
C.
D. 4 R
82.Which one of the following depicts the correct circuit of a reflex are?
83.If a free electron moves through a potential difference of 1kV, then the
energy gained by the electron is given by
A. 1.6 × 10-19 J
B. 1.6 × 10-16 J
C. 1 × 10-19 J
D. 1 × 10-16 J
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85.Which one of the following is the correct relation between A and nm?
A. 1 nm = 10-1 A
B. 1 nm = 10 A
C. 1 nm = 1 A
D. 1 nm = 10-2 A
A. less than 20 Hz
B. between 20 Hz and 2 kHz
C. between 2 kHz and 20 kHz
D. greater than 20 kHz
88. Statement I :
Statement II :
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89.
Statement I :
Statement II :
A. 0.05 tesla
B. 0.2 tesla
C. 0.4 tesla
D. 0.8 tesla
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93.The refractive indices of two media are denoted by n1 and n2, and the
velocities of light in these two media are respectively v1 and v2. If n2/n1 is
1.5, which one of the following statements is correct?
A. v1 is 1.5 times v2
B. v2 is 1.5 times v1
C. v1 is equal to v2
D. v1 is 3 times v2
95.A ball is released from rest and rolls down an inclined plane, as shown
in the following figure, requiring 4 s to cover a distance of 100 cm along
the plane:
Which one of the following is the correct value of angle θ that the plane
makes with the horizontal? (g = 1000 cm/s2)
A. θ = sin-1 (1/9.8)
B. θ = sin-1 (1/20)
C. θ = sin-1 (1/80)
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D. θ = sin-1 (1/100)
96.If the focal length of a convex lens is 50cm, which one of the following
is its power?
A. +2 dioptre
B. +0.02 dioptre
C. -0.5 dioptre
D. +0.5 dioptre
A. 8 m/s2
B. 12 m/s2
C. 2 m/s2
D. -1 m/s2
A. 1 A
B. 1 μm
C. 1 mm
D. 1 cm
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D. increasing Voltage
A. time
B. distance
C. the total amount of light falling on the Earth in a year
D. the average intensity of light falling on the Earth in a year
A. Increase
B. Decrease
C. Remain exactly the same
D. Increase or decrease cannot be predicted
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A. 13.6 MeV
B. 13.6 eV
C. 13.6 Joule
D. Zero
A. Free Electrons
B. Conduction Electrons
C. Ions
D. Holes
A. Ultraviolet Waves
B. Infrared Waves
C. Radio Waves
D. Microwaves
A. Concave
B. Convex
C. Cylindrical
D. Plane
109.Radioactivity is measured by –
A. GM Counter
B. Polarimeter
C. Calorimeter
D. Colorimeter
110.How long does light take to reach the Earth from the Sun?
A. About 4 minutes
B. About 8 minutes
C. About 24 minutes
D. About 24 hours
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A. Thermionic Emission
B. Photoelectric Emission
C. High field Emission
D. Auto electronic Emission
A. t1 > t2 > t3
B. t1 > t3 > t2
C. t3 > t1 > t2
D. t1 = t2 = t2
A. Holm
B. Halogen
C. Henry
D. Hertz
115.Which one of the following waves does not belong to the category of
the other three?
A. X-rays
B. Microwaves
C. Radio waves
D. Sound waves
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116.The statement that ‘heat cannot flow by itself from a body at a lower
temperature to a body at a higher temperature’, is known as
A. Infrasonic waves
B. Ultrasonic waves
C. Radio waves
D. Microwaves
118.An object moves in a circular path with a constant speed. Which one
of the following statements is correct?
A. 5 Ω
B. 10 Ω
C. 20 Ω
D. 40 Ω
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122.If the absolute refractive indices of glass and water are 3/2 and 4/3
respectively, what will be the ratio of the velocity of light in glass and
water?
A. 3 : 4
B. 4 : 3
C. 8 : 7
D. 8 : 9
relation ?
C. The quantity G is used only when the earth is one of the two masses
D. The quantity G is a universal constant
A. 574
B. 301
C. 273
D. 232
E. None of the above/More than one of the above
A. ƒ = πω
B. ω = 2πƒ
C. ƒ = 2ω/π
D. ƒ = 2πω
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