Light, Heat, Thermodynamics, Wave Motion, Sound, Optics & Oscillations - Category Wise Question And Answer Practice Test With Solutions

Question : 6 [UPPCS (Pre) 2012]

In an Earthen pitcher, the water remains cold due to the process of

a) Evaporation

b) Sublimation

c) Condensation

d) None of the above

Question : 7 [CDS]

Two identical piano wires have same fundamental frequency when kept under the same tension. What will happen if tension of one of the wire is slightly increased and both the wires are made to vibrate simultaneously?

a) Beats

b) Noise

c) Resonance

d) Non-linear effects

Question : 8 [IAS (Pre) 2003]

Consider the following statements.

1. Steam at 100ºC and boiling water at 100ºC contain the same amount of heat.
2. The latent heat of the fusion of ice is equal to the latent heat of the vaporization of water.
3. In an air conditioner, heat is extracted from the room air at the evaporator coils and is ejected out at the condenser coils.

a) 2 and 3

b) Only 2

c) 1 and 2

d) Only 3

Question : 9

The small ozone layer on the top of stratosphere is crucial for human survival as it –

a) decreases oxygen in the atmosphere

b) increases the carbon dioxide in the atmosphere

c) increases carbon mono-oxide in the atmosphere

d) absorbs ultraviolet radiations

Question : 10

The temperature of the sun is measured with

a) Pyrometer

b) Platinum thermometer

c) Gas theromometer

d) Vapour pressure thermometer