Questions and answers for exam Preparation

MCQs

Total Questions : 150 | Page 11 of 15 pages

Question 101. Match List I with List II and choose the correct answer from the codes given below the lists.

A -2 B -1 C -4 D -5
A -3 B -4 C -5 D -1
A -2 B -3 C -1 D -5
A -4 B -2 C -5 D -3

Discuss Question

Answer: Option A. -> A -2 B -1 C -4 D -5
:
A
Option:(a)

Question 102. If the radius of the earth were to shrink by one per cent, its mass remaining the same, the value of g on the earth's surface would

increase by 0.5%
increase by 2%
decrease by 0.5%
decrease by 2%

Discuss Question

Answer: Option B. -> increase by 2%
:
B
Option:(b)

Question 103. Match List I with List II and choose the correct answer from the codes given below the lists.

A -2 B -3 C -1 D -4
A -1 B -2 C -3 D -4
A -2 B -3 C -4 D -1
A -1 B -4 C -3 D -2

Discuss Question

Answer: Option A. -> A -2 B -3 C -1 D -4
:
A
Option:(a)

Question 104. The swing of a spinning cricket ball in the air can be explained on the basis of

sudden change in wind direction
buoyancy of air
turbulence caused by wind
Bernoulli's theorem

Discuss Question

Answer: Option D. -> Bernoulli's theorem
:
D
Option:(d)

Question 105. Which one of the following statements is not correct?

The velocity of sound in air increases with the increase of temperature.
The velocity of sound in air is independent of pressure.
The velocity of sound in air decreases as the humidity increases.
The velocity of sound in air is not affected by the change in amplitude and frequency.

Discuss Question

Answer: Option C. -> The velocity of sound in air decreases as the humidity increases.
:
C
Option:(c)

Question 106. On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because

mercury is a metal
density of mercury is greater than that of water
cohesion of mercury is greater than its adhesion with glass
cohesion of water is greater than its adhesion with glass

Discuss Question

Answer: Option C. -> cohesion of mercury is greater than its adhesion with glass
:
C
Option:(c)

Question 107. Consider the following statements with reference to X-rays;
1.They produce heat when absorbed by matter.
2.They are generated when fast moving electrons strike a metal target.
3.They can penetrate through a thin sheet of aluminium.
Which of the statements given above are correct?

1, 2 and 3
1 and 2
2 and 3
1 and 3

Discuss Question

Answer: Option A. -> 1, 2 and 3
:
A
Option:(a)

Question 108. Consider the following statements At the present level of technology available in India, solar energy can be conveniently used to
1.Supply hot water to residential buildings.
2.Supply water for minor irrigation projects.
3.Provide street lighting.
4.Electrify a cluster of villages and small towns.

1, 2, 3 and 4 are correct
2 and 4 are correct
1 and 3 are correct
1, 2 and 3 are correct

Discuss Question

Answer: Option D. -> 1, 2 and 3 are correct
:
D
Option:(d)

Question 109. Total internal reflection can take place when light travels from

diamond to glass
water to glass
air to water
air to glass

Discuss Question

Answer: Option A. -> diamond to glass
:
A
Option: (a)

Question 110. Assertion (A): Transformer is useful stepping up or stepping down voltages.
Reason (R): Transformer is a device used in D.C. circuits. In the context of the above two statements, which one of the following is correct?