set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

For which one of the following is capillarity not the reason?

a) Spread a water drop on a cotton cloth

b) Rising of underground water

c) Blotting of ink

d) Rising of water from the roots of a plant to its foliage

Question : 2

Consider the following statements:

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.

a) Both 1 and 2

b) 2 only

c) 1 only

d) Neither 1 nor 2

Question : 3

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:

a) decrease by 0.5%

b) increase by 2%

c) increase by 0.5%

d) decrease by 2%

Question : 4

A body weighs 5 kg on equator. At the poles it is likely to weight

a) 0 kg

b) less than 5 kg but not zero

c) 5 kg

d) more than 5 kg

Question : 5

Consider a satellite going round the earth in a circular orbit. Which of the following statements is wrong?

a) It is acted upon by a force directed away from the centre of the earth which counter-balances the gravitational pull.

b) It is moving with constant speed

c) It is a freely falling body.

d) It is an accelerated motion

Question : 6

Raw mangoes shrivel when pickled in brine. The phenomenon is associated with

a) increase of surface tension of fluid

b) reverse osmosis

c) osmosis

d) decrease of surface tension of fluid