JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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Understanding +4 | -1

A cane is taken out from a refrigerator at

{0^0}C

. The atmospheric temperature is

{25^0}C

. If

{t_1}

is the time taken to heat from

{0^0}C

{5^0}C

and

{t_2}

is the time taken from

{10^0}C

{15^0}C

, then

View answer and explanation

Correct option: B

{t_1} < {t_2}

Option A (

{t_1} > {t_2}

) is correct because according to Newton's law of cooling, the rate of cooling is proportional to the temperature difference between the object and its surroundings.

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In the relation

n = \frac{{PV}}{{RT}},n =

Mud houses are cooler in summer and warmer in winter because For cooking the food, which of the following type of utensil is most suitable Which of the following statements is correct? 300 gm of water at

{25^0}

is added to 100 g of ice at

{0^0}C

. The final temperature of the mixture is A black body radiates energy at the rate of

E\,\,W{m^{ - 2}}

at a high temperature T K. When the temperature is reduced to

\left( {\frac{T}{2}} \right)K

the radiant energy is