Physics MCQs for Class 9 with Answers Chapter 7

Normal human body temperature is :

15°C

98.6°C

37°C

37°F

Length of a rod is L∘ on temperature T∘. After heating upto temperature T, its length L becomes

L = L∘ (1 + αΔT)

L = L∘ (1 + ΔT)

L = L∘ (1 – αΔT)

L = L∘ (1 -ΔT)

The formula of heat capacity is:

mc

mc??

mc?Q/?T

None of these

The value of latent heat of vaporization of water is:

2.26 x 106 Jkg-1

2.29 x 105Jkg-1

2.26 x 10-6Jkg-1

3.29 x 10-5Jkg-1

Degree of hotness or coldness measures the body:

Heat

Temperature

Energy

Thermal

A large water reservoir heeps the temperature of nearby land moderate due to:

Low temperature

Low specific heat of water

Less absorption of heat

Large specific heat of water

“Latent” is derived from …………… word.

Latin

English

Greek

Roman

Latent heat of fusion of water is:

3.36 x 1010 Jkg-1

93.6 x 1010Jkg-1

3.36 x 105Jkg-1

None of these

The specific heat of glass is:

501.72

500

501

502

Heat travels from __________

Colder to hotter

Hotter to colder

Both a & b are possible

None of above