set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

‘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 : 3

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 : 4

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 : 5

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

Question : 6

A thunder clap is heard 5.5 second after the lightening flash. The distance of the flash is (velocity of sound in air = 330 m/s)

a) 300 m

b) 1780 m

c) 1815 m

d) 3560 m