Radiation Quiz Questions and Answers PDF Download - 73

Process of heat transfer that involves continual emission of infrared waves from surface of bodies and transmission of these waves without aid of medium is known as

1. Conduction
2. Convection
3. Radiation
4. None of the above

A constant force on an object given by the product of the force and the distance moved by the object in the direction of the force is termed as

1. Work done
2. Efficiency
3. Power
4. Energy

Conduction in liquids and gases is less efficient than solids because

1. collision in liquids is more as compared to solids
2. collision is less as compared to solids
3. in liquids and gases, particles are in random motion
4. in liquids and gases, particles are far apart

Electrical voltage or E.M.F (Electro Motive Force) is a physical property of

1. Mercury-in-glass thermometer
2. Thermocouple thermometer
3. resistance thermometer
4. Constant-volume gas thermometer

If pressure of a liquid is 1000 Pa and height of the liquid is 20 cm, then density of the liquid is (keeping in mind the gravitational pull of earth)

1. 50 g cm^-1
2. 5 g cm^-1
3. 100 g cm^-1
4. 0.2 g cm^-1