Physics MCQs

Page No. 4

Normal human body temperature 98.6°F corresponds to______________?


a37°C

✓


b42°C

✖


c 55°C

✖


d410°C

✖


View Answer 37°C

Numerical value of Boltzmanns constant is______________?


a1.38×10-31JK-1

✖


b 3.18×10-31JK-1

✖


c3.18×10-23JK-1

✖


d1.38×10-23JK-1

✓


View Answer 1.38×10-23JK-1

We prefer mercury as a thermometric substance because______________?


aOver a wide range of temperature its expansion is uniform

✖


bIt does not stick to thermometer glass

✖


cIt opaque to light

✖


dAll of above

✓


View Answer All of above

In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________?


a Mercury takes a long time to contract

✖


bThe amount of mercury use is very small

✖


cThe capillary tube has a small constriction near the bulb

✓


dThe capillary tube is very narrow

✖



Which one is not an example of adiabatic process ?


a rapid escape of air from a burst tyre

✖


brapid expansion of air

✖


cconversion of water into ice in refrigerator

✓


dcloud formation in the atmosphere

✖



If the volume of a gas is held constant and we increase its temperature then_______________?


aits pressure is constant

✖


bits pressure rises

✓


cits pressure falls

✖


dany of above

✖


View Answer its pressure rises

Boyles law helds for ideal gases in________________?


aisochoric processes

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b isobaric processes

✖


cisothermal processes

✓


dadiabatic processes

✖


View Answer isothermal processes

Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________?


a volume

✖


bpressure

✖


cabsolute temperature

✓


dtime

✖


View Answer absolute temperature

If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________?


aBoyles law

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bCharles law

✓


cIdeal gas law

✖


dAvagadros law

✖


View Answer Charles law

The pressure exerted by a column of mercury 76cm high and at 0°C is called_______________?


a1 atmosphere

✓


b1 Newton per square meter

✖


c1 Pascal

✖


ddata is insufficient

✖


View Answer 1 atmosphere

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