set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

For the construction of a thermometer, one of the essential requirements is a thermometric substance which

a) has a property that varies with temperature

b) has property that varies linearly with temperature

c) remains liquid over the entire range of temperatures to be measured

d) obey Boyle’s law

Question : 2

If a liquid is heated in condition of weightlessness, the heat is transmitted through

a) radiation

b) conduction

c) convection

d) None, because the liquid cannot be heated in weightlessness

Question : 3

A cut diamond shines brilliantly due to

a) Its molecular structure

b) Total internal reflection

c) Some inherent property

d) Absorption of light

Question : 4

A child is standing in front of a magic mirror. She finds the image of her head bigger, the middle portion of her body of the same size and that of the legs smaller. The following is the order of combinations for the magic mirror from the top.

a) Concave, plane and convex

b) Plane, convex and concave

c) Convex, concave and plane

d) Convex, plane and concave

Question : 5

What is the decibel level of sound produced by two persons in conversation?

a) About 10 decibel

b) About 30 decibel

c) About 5 decibel

d) About 100 decibel

Question : 6

Consider the following statements with reference to observations made by an astronaut on the surface of moon:

1. The astronaut finds that a simple pendulum continues to oscillate for a much longer time, than that on the earth.
2. No atmosphere exists there.

a) Only 2

b) Only 1

c) Both 1 and 2

d) Neither 1 nor 2