NEET UG PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

1 Hard

1 of 1

Application +4 | -1

A solid copper sphere (density

\rho

and specific heat capacity

c

) of radius

r

at an initial temperature

200K

is suspended inside a chamber whose walls are at almost

0K

. The time required (in

\mu \,s

) for the temperature of the sphere to drop to

100\,K

View answer and explanation

Correct option: C

\frac{{27}}{7}\frac{{r\rho c}}{\sigma }

Option C (

\frac{{27}}{7}\frac{{r\rho c}}{\sigma }

) is correct because it is derived from the Stefan-Boltzmann law and heat loss equation, considering the rate of temperature change.

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