NEET UG PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

1 Easy

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Application +4 | -1

An aluminum measuring rod, which is correct at

{5^ \circ }C

measures a certain distance as 88.42 m at

{35^ \circ }C

. The error in measuring the distance due to the expansion of the rod is

\left( {\alpha = 23 \times {{10}^{ - 6}}/1{\,^ \circ }C} \right)

View answer and explanation

Correct option: D

0.06 m

Option A (0.02 m) is incorrect. Option B (0.03 m) is incorrect. Option C (0.12 m) is incorrect. Option D (0.06 m) is correct because it is the error calculated using the coefficient of linear expansion and the initial length.

More Questions from THERMAL PROPERTIES OF MATTER

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Four identical calorimeters painted in different colours, are heated to same temperature and then allowed to cool in vacuum. Which will cool fastest? An ice cube of dimensions

60 \mathrm{~cm} \times 50 \mathrm{~cm} \times 20 \mathrm{~cm}

is placed in an insulation box of wall thickness

1 \mathrm{~cm}

. The box keeping the ice cube at

0^{\circ} \mathrm{C}

of temperature is brought to a room of temperature

40^{\circ} \mathrm{C}

. The rate of melting of ice is approximately.

(Latent heat of fusion of ice is

3.4 \times 10^5 \mathrm{~J} \mathrm{~kg}^{-1}

and thermal conducting of insulation wall is

\left. {0.05{\text{W}}{{\text{m}}^{ - 1}}^\circ {{\text{C}}^{ - 1}}} \right)

A black body radiates heat energy at the rate of

2 \times 10^5 \mathrm{~J} / \mathrm{sm}^2

at temp. of

127^{\circ} \mathrm{C}

. The temp of black body at which rate becomes

32 \times 10^5 \mathrm{~J} / \mathrm{s}-\mathrm{m}^2

is: The amount of radiation emitted by a perfectly black body is proportional to Amount of heat required to raise the temperature of a body through 1K is called its If Poisson’s ratio

\sigma

+ \frac{1}{2}

for a material, then the material is