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question_answer1)
The value of acceleration due to gravity
A)
is same on equator and poles done
clear
B)
is least on poles done
clear
C)
is least on equator done
clear
D)
increases from pole to equator done
clear
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question_answer2)
Two objects of different masses falling freely near the surface of moon would
A)
have same velocities at any instant done
clear
B)
have different accelerations done
clear
C)
experience forces of same magnitude done
clear
D)
undergo a change in their inertia done
clear
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question_answer3)
Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?
A)
8.9 N done
clear
B)
9.8 N done
clear
C)
89 N done
clear
D)
98 N done
clear
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question_answer4)
A geostationary satellite
A)
can move about any axis done
clear
B)
must move about the polar axis done
clear
C)
must move on an axis in the equatorial plane done
clear
D)
Both [b] and [c] done
clear
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question_answer5)
An astronaut in the orbit in a spacecraft feels weightlessness
A)
due to the absence of gravity inside done
clear
B)
due to the face that space craft has no energy done
clear
C)
because acceleration in the orbit is equal to acceleration of gravity outside done
clear
D)
their is no gravity outside done
clear
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question_answer6)
The weight of a body is 9.8 N at the place where g = 9.8 \[m{{s}^{-2}}\]. Its mass is [NDA]
A)
zero done
clear
B)
9.8 kg done
clear
C)
10 kg done
clear
D)
1kg done
clear
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question_answer7)
If the moon is to escape from the gravitational field of the earth forever, it will require a velocity [SSC CGL]
A)
11.2 km/s done
clear
B)
less than done
clear
C)
slightly more than 111.2 km/s done
clear
D)
22.4 km/s done
clear
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question_answer8)
In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true?
A)
Gravitational force is stronger than the other two. done
clear
B)
Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive. done
clear
C)
Gravitational force has a very short range. done
clear
D)
Gravitational force is a long range force, while the other two are short range forces. done
clear
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question_answer9)
Directions (Q.9) : Each of these questions contain two statements, Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below. |
Assertion: The tidal waves in sea are primarily due to the gravitational effect of earth. |
Reason: The intensity of gravitational field of earth is maximum at the surface of earth. |
A)
Assertion is correct, reason is correct; reason is a correct explanation for assertion. done
clear
B)
Assertion is correct, reason is correct; reason is not a correct explanation for assertion done
clear
C)
Assertion is correct, reason is incorrect done
clear
D)
Assertion is incorrect, reason is correct. done
clear
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question_answer10)
Consider the following statements: [NDA]
1. The gravitational force exerted by the sun on the moon is greater than the gravitational force exerted by the earth on the moon. |
2. A heavy body falls at a faster rate than a light body in vacuum. |
Which of the following statements given above is/are correct?
A)
1 only done
clear
B)
2 only done
clear
C)
Both 1 and 2 done
clear
D)
Neither 1 nor 2 done
clear
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question_answer11)
A body weighs 5 kg on equator. At the poles it is likely to weight [NDA]
A)
5kg done
clear
B)
less than 5 kg but not zero done
clear
C)
0 kg done
clear
D)
more than 5 kg done
clear
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question_answer12)
A spring balance is graduated on sea level. A body of mass 1 kg is weighed at consecutively increasing heights from the earth's surface, then what would be the weight indicated by the balance?
A)
Weight will go on increasing continuously done
clear
B)
Weight will go on decreasing continuously done
clear
C)
Weight will remain same done
clear
D)
Weight will first increase and then decreases done
clear
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question_answer13)
The mass of a body on earth is 100 kg (acceleration due to gravity, \[{{g}_{e}}=10\,\,m/{{s}^{2}}\] .If acceleration due to gravity on the moon is \[{{g}_{e}}/6\], then the mass of the body on the moon is : [IAS Prelim]
A)
100/6 kg done
clear
B)
60 kg done
clear
C)
100 kg done
clear
D)
600kg done
clear
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question_answer14)
Match the columns I and II.
|
Column I
|
|
Column II
|
A.
|
Weight
|
1.
|
Minimum
|
B.
|
\[{{g}_{equator}}\]
|
2.
|
Zero
|
C.
|
\[{{g}_{poles}}\]
|
3.
|
Vector
|
D.
|
\[{{g}_{centre}}\]
|
4.
|
Maximum
|
A)
[A] \[\to \] (2); [B] \[\to \] [1]; [C] \[\to \] (3); [D] \[\to \] (4) done
clear
B)
[A] \[\to \] (2); [B] \[\to \] (2); [C] \[\to \] (4); [D] \[\to \] (3) done
clear
C)
[A] \[\to \] (3); [B] \[\to \] (1); [C] \[\to \] (4); [D] \[\to \] (2) done
clear
D)
[A] \[\to \] (4); [B] \[\to \] (3); [C] \[\to \] (1); [D] \[\to \] (2) done
clear
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question_answer15)
Assertion [A]: The weight of a body decreases with the increase of altitude on earth. |
Reason [R]: The earth is not a perfect sphere. [IAS Prelim] |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not a correct explanation of A done
clear
C)
A is true hut R is false done
clear
D)
A is false but R is true done
clear
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question_answer16)
If the radius of the earth were to shrink by one percent, its mass remaining the same, the value of g on the earth's surface would: [IAS Prelim]
A)
increase by 0.5% done
clear
B)
increase by 2% done
clear
C)
decrease by 0.5% done
clear
D)
decrease by 2% done
clear
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question_answer17)
An artificial satellite orbiting the earth does not fall down because the earth's attraction
A)
is balanced by the attraction of the moon done
clear
B)
vanishes at such distances done
clear
C)
is balanced by the viscous drag produced by the atmosphere done
clear
D)
produces the necessary acceleration of its motion in a curved path done
clear
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question_answer18)
Consider the following statements: |
A body weighs less at the equator than at the poles because: [NDA] |
1. earth rotates about its axis. |
2. the ice cap at the poles increases gravitational pull. |
3. equatorial diameter is greater than the polar diameter. |
4. of some unknown facts. |
Which of the statements given above is/are incorrect?
A)
1 and 2 done
clear
B)
3 only done
clear
C)
1 and 3 done
clear
D)
4 only done
clear
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question_answer19)
Assertion [A]: Gravitational attraction is a central force and therefore in motion of planets in the solar system, the angular momentum is conserved. |
Reason [R]: In the motion of planets of the solar system, equal areas are swept in equal time. |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not the correct explanation of A done
clear
C)
A is true but R is false done
clear
D)
A is false but R is true done
clear
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question_answer20)
Which one of the following statements regarding artificial satellite of the earth is incorrect?
A)
The orbital velocity depends on the mass of the satellite done
clear
B)
A minimum velocity of 8 km/s is required by a satellite to orbit quite close to the earth done
clear
C)
The period of revolution is large if the radius of its orbit is large done
clear
D)
The height of a geostationary satellite is about 36000 km from the earth. done
clear
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question_answer21)
Assertion [A]: Space rocket are usually launched in the equatorial line from west to east |
Reason [R]: The acceleration due to gravity is minimum at the equator. |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not the correct explanation of A done
clear
C)
A is true but R is false done
clear
D)
A is false but R is true done
clear
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question_answer22)
A body is at rest on the surface of earth. Which of the following statements is correct? [SSC CGL]
A)
Only weight of the body acts on it. done
clear
B)
Only upward force acts on the body. done
clear
C)
Frictional force acts on the body. done
clear
D)
Net upward force is equal to the net downward force. done
clear
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question_answer23)
Consider a satellite going round the earth in a circular orbit. Which of the following statements is wrong?
A)
It is a freely falling body. done
clear
B)
It is moving with constant speed done
clear
C)
It is acted upon by a force directed away from the centre of the earth which counter-balances the gravitational pull. done
clear
D)
It is an accelerated motion done
clear
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question_answer24)
Assertion: The value of 'g' is greater at the equator than at the poles. |
Reason: Radius is more at the equator than at the poles. |
A)
If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. done
clear
B)
If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion. done
clear
C)
If Assertion is correct but Reason is incorrect. done
clear
D)
If Assertion is incorrect but Reason is correct. done
clear
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question_answer25)
The substance which exhibits practically no elastic effect is
A)
rubber done
clear
B)
quartz done
clear
C)
Fe done
clear
D)
Cu done
clear
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question_answer26)
Kerosene oil rises up in a wick of lantern because of
A)
capillarity done
clear
B)
buoyant force done
clear
C)
diffusion of oil through the wick done
clear
D)
None of the above done
clear
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question_answer27)
The tendency of a liquid drop to contract and occupy minimum area is due to: [IAS Prelim]
A)
surface tension done
clear
B)
viscosity done
clear
C)
density done
clear
D)
vapour pressure done
clear
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question_answer28)
Which type/types of pen uses/use capillary action in addition to gravity for flow of ink? [CDS]
A)
Fountain pen done
clear
B)
Ballpoint pen done
clear
C)
Gel pen done
clear
D)
Both ballpoint and gel pens done
clear
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question_answer29)
When pressure exerted on an enclosed liquid or gas at rest, is transmitted equally in all the directions, is in accordance with:
A)
Pascal's law done
clear
B)
Boyle's law done
clear
C)
Archimedes' principle done
clear
D)
Principle of floatation done
clear
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question_answer30)
Purity of a metal can be determined with the help of
A)
Pascal's law done
clear
B)
Boyle's law done
clear
C)
Archimedes principle done
clear
D)
Conservation of mass principle done
clear
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question_answer31)
Flow velocities in an incompressible fluid can be measured with which one of the following? [NDA]
A)
Barometer done
clear
B)
Venturi tube done
clear
C)
Strain gauge done
clear
D)
Manometer done
clear
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question_answer32)
If a gas is heated at constant pressure its isothermal compressibility
A)
increases with temperature done
clear
B)
remains constant done
clear
C)
decreases with temperature done
clear
D)
decreases inversely with temperature. done
clear
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question_answer33)
A liquid is flowing in a streamlined manner through a cylindrical pipe. Along a section containing the axis of the pipe, the flow profile will be : [IAS Prelim]
A)
B)
C)
D)
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question_answer34)
For which one of the following is capillarity not the reason? [IAS Prelim]
A)
Blotting of ink done
clear
B)
Rising of underground water done
clear
C)
Spread a water drop on a cotton cloth done
clear
D)
Rising of water from the roots of a plant to its foliage done
clear
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question_answer35)
In scuba-diving, while ascending towards the water surface, there is a danger of bursting the lungs. It is because of [CDS]
A)
Archimedes' principle done
clear
B)
Boyle's law done
clear
C)
Gay-Lussac's law of combining volumes done
clear
D)
Graham's law of diffusion done
clear
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question_answer36)
The specific gravity of a substance is measured by a hydrometer at the sea level. If the measurement is done at the top of a mountain, what would be the specific gravity? [NDA]
A)
Zero done
clear
B)
More than that measured at the sea level done
clear
C)
Less than that measured at the sea level done
clear
D)
Same as that measured at the sea level done
clear
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question_answer37)
A block of ice is floating in a beaker containing liquid of specific gravity greater than one. When ice melts completely what happens to the level of liquid in the beaker? [NDA]
A)
It will remain the same as before done
clear
B)
It will go down done
clear
C)
It will rise up done
clear
D)
It may or may not change depending upon size of beaker done
clear
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question_answer38)
Assertion [A]: With the increase of temperature, the viscosity of glycerine increases. [NDA] |
Reason [R]: Rise of temperature increases kinetic energy of molecules. |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not a correct explanation of A done
clear
C)
A is true but R is false done
clear
D)
A is false but R is true done
clear
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question_answer39)
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? [IAS Prelim]
A)
Vessel B done
clear
B)
All the vessels A, B and C will be emptied simultaneously done
clear
C)
Vessel A done
clear
D)
Vessel C done
clear
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question_answer40)
Consider the following statements: [IAS Prelim]
1. If there were no phenomenon of capillarity 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?
A)
1, 2 and 3 only done
clear
B)
1, 3 and 4 only done
clear
C)
2 and 4 only done
clear
D)
1, 2, 3 and 4 done
clear
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question_answer41)
Raw mangoes shrivel when pickled in brine. The phenomenon is associated with [CDS]
A)
osmosis done
clear
B)
reverse osmosis done
clear
C)
increase of surface tension of fluid done
clear
D)
decrease of surface tension of fluid done
clear
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question_answer42)
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. [IAS Prelim] |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not a correct explanation of A done
clear
C)
A is true but R is false done
clear
D)
A is false but R is true done
clear
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question_answer43)
A liquid is kept in a regular cylindrical vessel up to a certain height. If this vessel is replaced by another cylindrical vessel having half the area of cross-section of the bottom, the pressure on the bottom will [CDS]
A)
remain unaffected done
clear
B)
be reduced to half the earlier pressure done
clear
C)
be increased to twice the earlier pressure done
clear
D)
be reduced to one-fourth the earlier pressure done
clear
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question_answer44)
Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent [CDS]
A)
reduces drastically the surface tension between water and oil done
clear
B)
increases the surface tension between water and oil done
clear
C)
increases the viscosity of water and oil done
clear
D)
decreases the viscosity in detergent mixed water done
clear
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question_answer45)
A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of \[45{}^\circ \]. The length of the liquid column will [NDA]
A)
increase done
clear
B)
decrease done
clear
C)
remain unchanged done
clear
D)
first decrease and then increase done
clear
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question_answer46)
Two identical blocks of ice, A and B, float in water as shown in the figure given below. Which one among the following statements in this regard is correct? [NDA]
A)
Block A displaces a greater volume of water since the pressure acts on a smaller bottom area done
clear
B)
Block A displaces a greater volume of water since its submerged end is lower in the water. done
clear
C)
Block B displaces a greater volume of water since its submerged end has a greater area in water done
clear
D)
The two blocks displace equal volumes of water since they have the same specific gravity and same mass done
clear
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question_answer47)
When a ship floats on water [NDA]
A)
it displaces no water done
clear
B)
the mass of water displaced is equal to the mass of the ship done
clear
C)
the mass of water displaced is lesser than the mass of the ship done
clear
D)
the mass of water displaced is greater than the mass of the ship done
clear
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question_answer48)
Why do two ice blocks join to form one block when pressed together? [NDA]
A)
Melting point of ice is lowered with increase in pressure done
clear
B)
Melting point of ice increases with increase in pressure done
clear
C)
Melting point of ice remains unchanged with increase in pressure done
clear
D)
Melting point of ice is \[0{}^\circ C\] done
clear
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question_answer49)
Consider two hollow glass spheres, one containing water and the other containing mercury. Each liquid fills about one-tenth of the volume of the sphere. In zero gravity environment [NDA]
A)
water and mercury float freely inside the sphere done
clear
B)
water forms a layer on the glass, while mercury floats done
clear
C)
mercury forms a layer on the glass, while water floats done
clear
D)
water and mercury both form a layer on the glass done
clear
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question_answer50)
Assertion [A]: A beaker filled with water at \[4{}^\circ C\]overflows if the temperature is decreased or increased. |
Reason [R]: Density of water is maximum at \[4{}^\circ C\]. |
A)
Both A and R are true and R is the correct explanation of A done
clear
B)
Both A and R are true but R is not a correct explanation of A done
clear
C)
A is true but R is false done
clear
D)
A is false but R is true done
clear
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