set 9 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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 : 3

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 : 4

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

Question : 5

For the myopic eye, the defect is cured by

a) Cylindrical lens

b) Concave lens

c) Convex lens

d) Toric lens

Question : 6

What is the purpose of ‘evolved Laser Interferometer Space Antenna (eLISA)’ project?

a) To detect gravitational waves

b) To detect the effectiveness of missile defence system

c) To detect neutrinos

d) To study the effect of solar flares on our communication systems