set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following statements regarding artificial satellite of the earth is incorrect?

a) The period of revolution is large if the radius of its orbit is large

b) A minimum velocity of 8 km/s is required by a satellite to orbit quite close to the earth

c) The orbital velocity depends on the mass of the satellite

d) The height of a geostationary satellite is about 36000 km from the earth.

Question : 2

A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of The length of the liquid column will

a) remain unchanged

b) decrease

c) increase

d) first decrease and then increase

Question : 3

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) A is true but R is false

b) Both A and R are true but R is not the correct explanation of A

c) Both A and R are ture and R is the correct explanation of A

d) A is false but R is true

Question : 4

When pressure exerted on an enclosed liquid or gas at rest, is transmitted equally in all the directions, is in accordance with:

a) Archimedes' principle

b) Boyle's law

c) Pascal's law

d) Principle of floatation

Question : 5

The value of acceleration due to gravity

a) is least on equator

b) is least on poles

c) is same on equator and poles

d) increases from pole to equator

Question : 6

The tendency of a liquid drop to contract and occupy minimum area is due to :

a) density

b) viscosity

c) surface tension

d) vapour pressure