Heat NDA Questions

NDA Physics

Heat MCQ Questions


13.
When two bodies of different temperatures are in contact heat flows from
A.
The hotter body to the colder body
B.
The colder body to the hotter body
C.
Both bodies equally
D.
None of the above
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ANSWER :
A. The hotter body to the colder body
14.
A calorimeter works on the principle of
A.
Conservation of mass
B.
Conservation of energy
C.
Conservation of momentum
D.
Conservation of charge
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ANSWER :
B. Conservation of energy
15.
In calorimetry the heat lost by the hot object is
A.
Less than the heat gained by the cold object
B.
More than the heat gained by the cold object
C.
Equal to the heat gained by the cold object
D.
Unrelated to the heat gained by the cold object
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ANSWER :
C. Equal to the heat gained by the cold object
16.
Insulators are materials that
A.
Allow heat to flow easily
B.
Conduct electricity well
C.
Do not allow heat to flow easily
D.
Change Temperature Rapidly
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ANSWER :
C. Do not allow heat to flow easily
17.
The resistance of a material to the flow of heat is called
A.
Thermal conductivity
B.
Thermal resistance
C.
Thermal expansion
D.
Thermal emission
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ANSWER :
B. Thermal resistance
18.
Which material has the highest thermal conductivity?
A.
Wood
B.
Glass
C.
Copper
D.
Air
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ANSWER :
C. Copper