set 12 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following is used to take 3-dimensional pictures?

a) Radiography

b) Holography

c) Photography

d) None of these

Question : 2

When T.V. is switched on

a) Audio is heard immediately but video starts later because video needs some warm up time

b) Video starts immediately but audio is heard later because sound travels at a lesser speed than light

c) Audio and video both start simultaneously

d) It depends on the T.V. brand

Question : 3

Which one of the following energy conversions takes place in carrying out the process of photosynthesis?

a) Thermal to biochemical energy

b) Light to thermal energy

c) Light to chemical energy

d) Heat to kinetic energy

Question : 4

What is absolute zero temperature?

a) Theoretically the lowest possible temperature

b) The temperature at which the vapour of any liquid substance is condensed

c) The starting point of any temperature scale

d) The temperature at which all material are in vapour form

Question : 5

Pressure cooker cooks food in lesser time because

a) Air has no effect as it is closed from all sides

b) Temperature of boiling water increases due to high pressure

c) The temperature of boiling water decreases due to high pressure

d) Evaporation of the water used is very small

Question : 6

A coin in a beaker filled with water appears raised. This phenomenon occurs because of the property of

a) total internal reflection of light

b) reflection of light

c) refraction of light

d) interference of light