question_answer 1)
The value of acceleration due to gravity
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question_answer 2)
Two objects of different masses falling freely near the surface of moon would
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question_answer 3)
Which one among the following is the correct value of the gravitational force of the Earth acting on a body of mass 1 kg?
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question_answer 4)
A geostationary satellite
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question_answer 5)
An astronaut in the orbit in a spacecraft feels weightlessness
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question_answer 6)
The weight of a body is 9.8 N at the place where g = 9.8 \[m{{s}^{-2}}\]. Its mass is [NDA]
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question_answer 7)
If the moon is to escape from the gravitational field of the earth forever, it will require a velocity [SSC CGL]
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question_answer 8)
In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true?
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question_answer 9)
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.
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question_answer 10)
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?
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question_answer 11)
A body weighs 5 kg on equator. At the poles it is likely to weight [NDA]
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question_answer 12)
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?
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question_answer 13)
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]
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question_answer 14)
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
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question_answer 15)
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]
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question_answer 16)
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]
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question_answer 17)
An artificial satellite orbiting the earth does not fall down because the earth's attraction
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question_answer 18)
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?
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question_answer 19)
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.
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question_answer 20)
Which one of the following statements regarding artificial satellite of the earth is incorrect?
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question_answer 21)
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.
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question_answer 22)
A body is at rest on the surface of earth. Which of the following statements is correct? [SSC CGL]
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question_answer 23)
Consider a satellite going round the earth in a circular orbit. Which of the following statements is wrong?
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question_answer 24)
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.
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question_answer 25)
The substance which exhibits practically no elastic effect is
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question_answer 26)
Kerosene oil rises up in a wick of lantern because of
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question_answer 27)
The tendency of a liquid drop to contract and occupy minimum area is due to: [IAS Prelim]
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question_answer 28)
Which type/types of pen uses/use capillary action in addition to gravity for flow of ink? [CDS]
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question_answer 29)
When pressure exerted on an enclosed liquid or gas at rest, is transmitted equally in all the directions, is in accordance with:
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question_answer 30)
Purity of a metal can be determined with the help of
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question_answer 31)
Flow velocities in an incompressible fluid can be measured with which one of the following? [NDA]
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question_answer 32)
If a gas is heated at constant pressure its isothermal compressibility
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question_answer 33)
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]
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question_answer 34)
For which one of the following is capillarity not the reason? [IAS Prelim]
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question_answer 35)
In scuba-diving, while ascending towards the water surface, there is a danger of bursting the lungs. It is because of [CDS]
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question_answer 36)
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]
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question_answer 37)
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]
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question_answer 38)
Assertion [A]: With the increase of temperature, the viscosity of glycerine increases. [NDA]
Reason [R]: Rise of temperature increases kinetic energy of molecules.
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question_answer 39)
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]
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question_answer 40)
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?
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question_answer 41)
Raw mangoes shrivel when pickled in brine. The phenomenon is associated with [CDS]
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question_answer 42)
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]
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question_answer 43)
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]
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question_answer 44)
Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent [CDS]
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question_answer 45)
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]
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question_answer 46)
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]
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question_answer 47)
When a ship floats on water [NDA]
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question_answer 48)
Why do two ice blocks join to form one block when pressed together? [NDA]
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question_answer 49)
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]
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question_answer 50)
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 \[4{}^\circ C\].
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