Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 15

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

A body cools from 60°C to 50°C in 10 min. If the room temperature is 25°C and assuming Newton's law of cooling to hold good, the temperature of the body at the end of the next 10 min will be

A
45° C

B
42.85° C

C
40° C

D
38.5° C
Question 2
4 / -1

If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on the earth to what it was previously, will be

A
4

B
16

C
32

D
64
Question 3
4 / -1

Assuming the sun to be a spherical body of radius R at a temperature of T K, evaluate the total radiant power, incident on the earth, at a distance r from the sun

A

B

C

D
Question 4
4 / -1

Newton's law of cooling holds good only, if the temperature difference between the body and the surroundings is

A
less than 10°C

B
more than 10°C

C
less than 100°C

D
more than 100°C
Question 5
4 / -1

Flash light equipied with a new set of batteries, produces bright white light. As the batteries wear out

A
the light intensity gets reduced with no change in its colour

B
light colour changes first to yellow and then red with no change in intensity

C
it stops working suddenly while giving white light

D
colour changes to red and also intensity gets reduced
Question 6
4 / -1

The wavelength of the radiation emitted by a body depends upon

A
the nature of the surface

B
the area of the surface

C
the temperature of the surface

D
All of the above
Question 7
4 / -1

Two identical bodies have temperatures 277°C and 67°C. If the surroundings temperature is 27°C, the ratio of loss of heats of the two bodies during the same interval of time is (approximately)

A
4 : 1

B
8 : 1

C
12 : 1

D
19 : 1
Question 8
4 / -1

The spectral energy distribution of a star is maximum at twice temperature as that of the sun. The total energy radiated by the star is

A
twice as that of the sun

B
same as that of the sun

C
sixteen times as that of the sun

D
one-sixteenth of the sun
Question 9
4 / -1

The coefficient of volume expansion of a liquid is 49 × 10^-5 K^-1. Calculate the fractional change in its density, when the temperature is raised by 30°C.

A
7.5 x 10^-3

B
3.0 x 10^-3

C
1.5 x 10^-2

D
1.1 x 10^-3
Question 10
4 / -1

A bimetallic strip consists of metals X and Y. It is mounted rigidly at the base as shown. The metal X has a higher coefficient of expansion compared to that for metal Y. When bimetallic strip is placed in a cold bath

A
it will bend towards the right

B
it will bend towards the left

C
it will not bend but shrink

D
it will neither bend nor shrink