set 14 MCQ Questions & Answers Detailed Explanation

Question : 1

An oscilloscope is an instrument which allows us to see waves produced by

a) X-rays

b) Visible light

c) Sound

d) Gamma rays

Question : 2

Which of the following radiations has the highest energy per quantum?

a) 280-320 nm

b) 200-280 nm

c) 320-400 nm

d) 400-600 nm

Question : 3

Bats can ascertain distance, directions, nature and size of the obstacles at night. This is possible by reflection of the emitted

a) ultrasonic waves from the distant objects

b) ultrasonic waves from the bat

c) supersonic waves from the bat

d) supersonic waves from the distant objects

Question : 4

The least distance of distinct vision of a normal eye of an adult is

a) 25 mm

b) 25 m

c) 25 cm

d) None of these

Question : 5

Consider the following statements:

1. Two bodies in contact must be in thermal equilibrium.
2. A tightly closed metal lid of a glass bottle can be opened more easily if it is put in hot water for sometime.
3. The coefficient of expansion of metal lid is greater than that of glass.

a) 2 and 3

b) 1 and 3

c) 1 and 2

d) 1, 2 and 3

Question : 6

Magnification produced by a rear view mirror fitted in vehicles

a) is equal to one

b) is less than one

c) is more than one

d) can be more than or less than one depending upon the position of the object in front of it