set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

‘Endoscope’ used by the doctors for examining the inside of patient’s stomach, works on the principle of

a) Refraction of light

b) Dispersion of light

c) Reflection of light

d) Total internal reflection of light

Question : 2

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 : 3

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 : 4

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 : 5

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

Question : 6

A mirage occurs because

a) the hot ground acts like a mirror

b) the refractive index of atmosphere increases with height

c) the refractive index of atmosphere decreases with height

d) refractive index remains constant with height