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General Science

Description: General Science
Number of Questions: 25
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Tags: General Knowledge Physics Branches of Science Letter E Antonyms Synonyms Letter H
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When a man circles around the earth in a satellite, _____.

  1. his weight remains constant but mass becomes zero

  2. his mass remains constant but weight becomes zero

  3. both his mass and weight remain constant

  4. both his mass and weight become zero


Correct Option: B

Nuclear forces are ____.

  1. the weakest in nature

  2. the strongest in nature

  3. negligible in nature

  4. none of these


Correct Option: B

If a stone is thrown parallel to the surface of the earth, its trajectory will be ______.

  1. a parabola

  2. a curve

  3. parallel to the earth

  4. perpendicular to the earth


Correct Option: A

When a body is raised upwards from the surface of the earth, its weight ________.

  1. increases

  2. remains the same

  3. decreases

  4. fluctuates


Correct Option: C
Explanation:

Decreases

By a common balance, we measure

  1. volume

  2. mass

  3. weight

  4. density


Correct Option: B
Explanation:

By a common balance, we measure mass.

As you go to high altitudes, acceleration due to gravity _________.

  1. decreases

  2. increases

  3. remains the same

  4. none of these


Correct Option: A

Weight of a man is more ________.

  1. at the equator

  2. at the poles

  3. at the centre

  4. in the space


Correct Option: B

An iron ball and a wooden ball fall simultaneously from a height h. If the viscosity of the air is negligible, which ball will hit the ground first?

  1. Iron ball

  2. Wooden ball

  3. Both will hit the ground at the same time

  4. It depends on some other factors also


Correct Option: C

If a ball weighs 12 kg on the earth, what will be its weight on the moon?

  1. 2 kg

  2. 6 kg

  3. 12 kg

  4. 24 kg


Correct Option: A

A geostationary satellite has a time period _______ the rotational period of the earth.

  1. double than

  2. same as

  3. thrice than

  4. four times than


Correct Option: B

There is no atmosphere on the moon because _____.

  1. it is closer to the earth

  2. it revolves around the earth

  3. it gets light from the sun

  4. on the moon the escape velocity of gas molecules is less than their root mean square velocity


Correct Option: D

Hydrogen bomb works on the principle of _____.

  1. nuclear fission

  2. nuclear explosion

  3. nuclear fusion

  4. none of the above


Correct Option: C

The unit of measuring radioactivity is ____.

  1. plank

  2. einstein

  3. curie

  4. none of these


Correct Option: C

The planets revolve around the sun in fixed orbits due to the ______.

  1. gravitational attraction of the sun

  2. gravitational attraction of the earth

  3. influence of the magnetic field of the earth

  4. none of these


Correct Option: A
Explanation:

 Planets are kept in orbit due to the gravitational attraction to the sun.

When the spring of a watch is compressed, the energy stored in it is ______.

  1. kinetic energy

  2. potential energy

  3. electrical energy

  4. magnetic energy


Correct Option: A

When a rain drop falls through the atmosphere with uniform velocity, ______.

  1. its potential energy remains the same

  2. its mechanical energy is conserved

  3. its mechanical energy is transferred to the atmosphere

  4. the total energy of the rain drop and air decays


Correct Option: D

Work is a _____.

  1. vector quantity

  2. scalar quantity

  3. fundamental unit

  4. none of the above


Correct Option: B
Explanation:

 Work is a scalar quantity.

A person pushing against a wall ______.

  1. does work

  2. does no work unless the wall is moved

  3. produces displacement

  4. none of the above


Correct Option: B

The maximum value of g i.e. acceleration due to gravity is _______.

  1. 980 ms-2

  2. 98 ms-2

  3. 9.8 ms-2

  4. 0.98 ms-2


Correct Option: C

The value of g at higher altitudes _____.

  1. decreases

  2. increases

  3. remains the same

  4. none of the above


Correct Option: A

The acceleration due to gravity at the centre of the earth is ______.

  1. maximum

  2. the same as that at the surface

  3. zero

  4. minimum


Correct Option: C

In vacuum, all freely falling objects _______.

  1. have the same speed

  2. have the same velocity

  3. have the same acceleration

  4. have the same force


Correct Option: B

Gravitational field at a point is ______.

  1. a scalar quantity

  2. a vector quantity

  3. neither scalar nor vector

  4. zero


Correct Option: B

A body falling freely under the action of gravity has _____.

  1. no weight

  2. minimum weight

  3. maximum Weight

  4. medium weight


Correct Option: A

The weight of an object would be minimum when it is placed ________.

  1. at the north pole

  2. at the south pole

  3. at the equator

  4. at the centre of the earth


Correct Option: D
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