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11595.Ice skating can be used to demonstrate that when ice is under pressure, its
Melting point is lowered
Melting point is raised
Melting point remains unchanged
Coefficient of friction with metal is reduced
11596.Match the columns:
Names of instruments   The quantities they measure
A. Anemometer1. Speed of rotation
B. Ammeter2. High temperatures
C. Tachometer3. Wind speed
D. Pyrometer4. Electric current
5. Pressure difference
4 3 1 5
3 4 1 2
3 5 2 1
1 4 5 2
11597.Very small time intervals are accurately measured by the
Pulsars
White dwarfs
Atomic clocks
Quartz clocks
11598.A ‘black hole’ is a body in space which does not allow any radiation to come out. This property is due to its:
very small size
very large size
very high density
very low size
11599.The tail of a comet is directed away from the sun because:
as the comet rotates around the sun, the lighter mass of the comet is pushed away due to the centrifugal force alone
as the comet rotates, the lighter mass of the comet is attracted by some stars situated in the direction of its tail
the radiation emitted by the sun exerts a radial pressure on the comet throwing its tail away from the sun
the tail of the comet always exists in the same orientation
11600.Consider the following statements:
A person in a spaceship located half way between the earth and the sun will notice that the:
1. sky is jet black.
2. stars do not twinkle.
3. temperature outside the spaceship is much higher than that on the surface of the earth.
3 alone is correct
1 and 2 are correct
1 and 3 are correct
1, 2 and 3 are correct
11601.A stone is tied to a rope and attached to a wooden bar which rotates at constant angular velocity. Suddenly the bar is stopped. The stone gets encircled around the bar. What happens to the angular velocity of the stone.
Increases
Decreases
Remains the same
First increases and then decreases
11602.The escape velocity from the earth’s surface is about
30 km/sec
6 km/sec
11.2 km/sec
300 km/sec
11603.If water contracts on freezing, which of the following would happen?
Icebergs will completely float on the surface of water
Ice would become more dense
Lakes would freeze from top to bottom
Rocks will crack due to freezing or internal water
11604.Two wires have their lengths, diameters and resistivities all in the ratio of 1:2. If the resistance of the thinner wire is 10 ohm, the resistance of the thicker wire is:
5 ohm
10 ohm
20 ohm
40 ohm
11605.A person sitting in a bus experiences a jerk, when the bus stops all of a sudden. This is due to
Law of inertia
Newton’s third law of motion
Einstein’s law of relativity
None of these
11606.Study the frequency of the following electromagnetic radiations and select the correct relationship (‘>’ implies greater than):
I.: Infrared
II.: Microwave
III.: Ultraviolet
I > II > III
III > I > II
III > II > I
II > III > I
11607.Which of the following laws was passed during the second half of the nineteenth century under the Social and Religious Reform Movement?
Formation of Theosophical Society
Sanction of inter caste and inter communal marriages
Opening of Aligarh Muslim University’
None of the above
11608.If the distance that a radio wave can travel in the time of one complete cycle is 10 metres, then the frequency of the radio wave in cycles per second is
3×108 m/sec
3×106 m/sec
3×109 m/sec
3×107 m/sec
11609.A truck, a car and a motor cycle have equal kinetic energies. If equal stopping
x > y > z
x < y < z
x = y = z
x 4y 8z
11610.Assertion (A): Transformer is useful for stepping up or stepping down voltages.
Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not a correct explanation of A.
A is true but R is false.
A is false but R is true.
11611.Consider the following statements:
At the present level of technology available in India, solar energy can be conveniently used to
I. supply hot water to residential buildings.
II. supply water for minor irrigation projects.
III. provide street lighting.
IV. electrify a cluster of villages and small towns.
Of these statements
I, II, III and IV are correct.
II and IV are correct
I and III are correct
I, II and III are correct
11612.Consider the following statements:
A person in a spaceship located half way between the earth and the sun will notice that the
I. Sky is jet black.
II. Stars do not twinkle.
III. Temperature outside the spaceship is much higher than that on the surface of the earth.
Of these statements
Only III is correct
I and II are correct
I and III are correct
I, II and III are correct
11613.An astronaut weighing 100 kg fires a bullet weighing 1 kg with a gun of 10 kg at the speed of 50 metres/second. What will be the recoil velocity of the gun?
5 cm/s
50 cm/s
0.5 cm/s
0.05 cm/s
11614.Match:
List IList II
Measuring instruments   Which measure
A. Anemometer1. Motor power
B. Tachometer2. Wind speed
C. Dynamometer3. Revolutions per minute
D. Barometer4. Atmospheric pressure
5.Current from a dynamo
A B C D
1 3 5 4
2 1 3 4
2 3 1 4
1 3 5 2
11615.What is the increasing order of the wavelengths of the following colours?
1. Orange
2. Indigo
3. Yellow
4. Violet
1, 2, 3 and 4
3, 1, 4 and 2
1, 3, 2 and 4
4, 2, 3 and 1
11616.A ball is dropped from the top of a high building with a constant acceleration of 9.8 m/s2. What will be its velocity after 2 seconds?
9.8 m/s
19.6 m/s
29.4 m/s
39.2 m/s
11617.A hunter aims his gun at a point between the eyebrows of a monkey sitting on a branch of a tree. Just as he fires, the monkey jumps down. The bullet will:
hit the monkey at the point aimed
hit the monkey below the point aimed
hit he monkey above the point aimed
miss the monkey altogether
11618.Consider the following features of newer models of motor cars:
1. Radial tyres
2. Streamlined body
3. Multipoint fuel injection
4. Catalytic converter with exhaust
Which of these features make the new models of motor cars more fuel efficient?
1 and 2
2 and 3
2, 3 and 4
1, 3 and 4
11619.Assertion (A): A man standing on a completely frictionless surface can propel himself by whistling.
Reason (R): If no external force acts on a system, its momentum cannot change.
Codes:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
11620.Consider the following statements: A simple pendulum is set into oscillation. Then:
1. the acceleration is zero when the bob passes through the mean position.
2. in each cycle the bob attains a given velocity twice.
3. both acceleration and velocity of the bob are zero
when it reaches its extreme position during the oscillation.
4. the amplitude of oscillation of the simple pendulum decreases with time.
Which of these statements are correct?
1 and 2
3 and 4
1, 2 and 4
2, 3 and 4
11621.Assertion (A): With the increase of temperature, the viscosity of glycerine increases.
Reason (R): Rise of temperature increases kinetic energy of molecules.
Codes:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
11622.Assertion (A): An iron ball floats on mercury but gets immersed in water.
Reason (R): The specific gravity of iron is more than that of mercury.
Codes:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
11623.Consider the following statements:
A 4-wheel vehicle moving in a sharp circular path at high speed will:
1. overturn about its outer wheels
2. overturn about its inner wheels
3. skid outwards
4. skid inwards
Which of these statements are correct?
1 and 3
2 and 4
2 and 3
1 and 4
11624.An oil tanker partially filled with oil moves forward on a level road with uniform acceleration. The free surface of oil then:
remains horizontal
is inclined to the horizontal with smaller depth at the rear end
is inclined to the horizontal with larger depth at the rear end
assumes a parabolic curve
11625.If the radius of the earth were to shrink by one per cent, its mass remaining the same, the value of g on the earth’s surface would:
increase by 0.5%
increase by 2%
decrease by 0.5%
decrease by 2%
11626.Which one of the following is the correct sequence of the given substances in the decreasing order of their densities?
Steel > Mercury > Gold
Gold > Mercury > Steel
Steel > Gold > Mercury
Gold > Steel > Mercury
11627.Four wires of same material and of dimensions as under are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?
Wire of 1m length and 2 mm diameter
Wire of 2 m length and 2 mm diameter
Wire of 3 m length and 1.5 mm diameter
Wire of 1 m length and 1 mm diameter
11628.Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?
Vessel B
All the vessels A, B and C will be emptied simultaneously
Vessel A
Vessel C
11629.Consider the following statements:
If there were no phenomenon of capillarity
1. it would be difficult to use a kerosene lamp
2. one would not be able to use a straw to consume a soft drink
3. the blotting paper would fail to function
4. the big trees that we see around would not have grown on the Earth
Which of the statements given above are correct?
1, 2 and 3 only
1, 3 and 4 only
2 and 4 only
1, 2, 3 and 4
11630.Ball bearings are used in bicycles, cars, etc., because
the actual area of contact between the wheel and axle is increased
the effective area of contact between the wheel and axle is increased
the effective area of contact between the wheel and axle is reduced
None of the above statements is correct
11631.Consider the following statements:
1. A geo-stationary satellite is at an approximate height of 10,000 km.
2. FM transmission of music is of very good quality because the atmospheric or man made noises which are generally frequency variations can do little harm.
Which of the statements give above is/are correct?
1 only
2 only
Both 1 and 2.
Neither 1 nor 2
11632.Assertion (A): A piece of copper and a piece of glass are heated to the same temperature. When touched, thereafter, the copper piece appears hotter than the glass piece.
Reason (R): The density of copper is more than that of glass.
Codes:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
11633.A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above room temperature. When left to cool in the room, which of them will reach the room temperature first?
Circular plate
Cube
Sphere
All of them will reach the room temperature at the same time
11634.Consider the following statements:
1. Steam at 100°C and boiling water at 100°C contain same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3. In an air-conditioner, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?
1 and 2
2 and 3
Only 2
Only 3
11635.Cloudy nights are warmer compared to clear cloudless nights, because clouds:
prevent clod waves from the sky from descending on earth
reflect back the heat given off by earth
produce heat and radiate it towards earth
absorb heat from the atmosphere and send it towards earth
11636.Given below are two statements
Assertion (A): A diamond sparkles more than a glass imitation cut to the same shape.
Reason (R): The refractive index of diamond is less than that of glass.
In context of the above two statements, which one of the following is correct?
Both A and R are true and R is the correct explanation of A
Both A and R are true and R is not a correct explanation of A
A is true but R is false
A is false but R is true
11637.Suppose a rocketship is receding from the earth at a speed of 2/10 th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
Blue
Orange
Yellow
Yellow-orange
11638.Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the lists:
List-I List-II
A. High speed 1. Mach
B. Wavelength 2. Angstrom
C. Pressure 3. Pascal
D. Energy 4. Joule
Codes:
A-2, B-1, C-3, D-4
A-1, B-2, C-4, D-3
A-1, B-2, C-3, D-4
A-2, B-1, C-4, D-3
11639.Consider the following statements:
1. If a person looks at a coin which is in a bucket of water, the coin will appear to be closer than it really is.
2. If a person under water looks at a coin above the water surface, the coin will appear to be at a higher level than it really is.
Which of the above statements is/are correct?
1 and 2
1 alone
2 alone
neither 1 nor 2
11640.When a CD (compact disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of:
reflection and diffraction
reflection and transmission
diffraction and transmission
refraction, diffraction and transmission
11641.Assertion (A): A stick is dipped in water in a slanting position. If observed sideways, the stick appears short and bent at the surface of water.
Reason (R): A light coming from the stick undergoes scattering from water molecules giving the stick a short and bent appearance.
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
11642.Consider the following statements:
1. Light of longer wavelength are scattered much more than the light of shorter wavelength.
2. The speed of visible light in water is 0.95 times the speed in vacuum.
3. Radio waves are produced by rapidly oscillating electrical currents.
4. To detect the over speeding vehicles, police use the Doppler effect of reflected short radio waves.
Which of these statements are correct?
1 and 2
1 and 3
2 and 4
3 and 4
11643.Consider the following natural phenomena:
1. Terrestrial heating
2. Reflection of light
3. Refraction of light
4. Diffraction of light
Due to which of these phenomena is a mirage formed?
1 and 2
2, 3 and 4
1 and 3
4 only
11644.Which one of the following statements is not correct?
The velocity of sound in air increases with the increase of temperature
The velocity of sound in air is independent of pressure
The velocity of sound in air decreases as the humidity increases
The velocity of sound in air is not affected by the change in amplitude and frequency
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