Higher Study | Physics | Thermal Properties of Matter

Helium shows Bose-Einstein condensation below what temperature?

ক

100.5 K

খ

12.3 K

গ

5.12 K

ঘ

2.13 K

Heat energy of an object is

ক

the average energy of the molecules of the object

খ

the total energy of the molecules of the object

গ

the average velocity of the molecules of the object

ঘ

the average potential energy of the molecules of the object

In which of the following phenomena do heat waves travel along a straight line with the speed of light?

ক

Thermal conduction

খ

Thermal convention

গ

Thermal radiation

ঘ

Both A and C

Which one of the following could be the melting point of iron?

ক

25°C

খ

37°C

গ

500°C

ঘ

1500°C

A pressure cooker works on the principle of

ক

elevation of boiling point of water by application of pressure

খ

making the food-grains softer by application of pressure

গ

making the food-grains softer by application of pressure and temperature

ঘ

keeping the food-grains inside steam for a longer time

The temperature of the sun is measured with

ক

platinum thermometer

খ

gas thermometer

গ

pyrometer

ঘ

vapour pressure thermometer

The blackbody radiation curve for different temperatures peaks at a wavelength is inversely proportional to the temperature. This is stated by:

ক

Stefan Boltzman law

খ

Planck's law

গ

Wein's law

ঘ

None of the above

The heat from the sun reaches the earth by the process of:

ক

Conduction

খ

Radiation

গ

Convection

ঘ

All of the above

Natural convection is not possible on:

ক

Moon

খ

Orbiting satellite

গ

Both 1 and 2

ঘ

None of these

During the sea breeze:

ক

Both pressure and temperature over the sea is lower than pressure over the land

খ

Both pressure and temperature over the land is lower than pressure over the sea

গ

Pressure is lower but temperature is higher over the land compared to the sea

ঘ

Pressure is lower but temperature is higher over the sea compared to the land

Match the following (a) Laboratory Thermometer (i) Avoids use of mercury (b) Clinical Thermometer (ii) To measure the boiling point of water (c) Digital Thermometer (iii) To check the temperature of atmosphere around (d) Maximum Minimum Thermometer (iv) To check body temperature

ক

(a) - (ii), (b) - (iv), (c) - (iii),(d) - (i)

খ

(a) - (i), (b) - (iii), (c) - (iv),(d) - (ii)

গ

(a) - (iv), (b) - (iii), (c) - (ii),(d) - (i)

ঘ

(a) - (ii), (b) - (iv), (c) - (i),(d) - (iii)

Newton's Law of cooling is applicable only-

ক

When the temperature change of the surrounding with time is very small.

খ

When the temperature change of the surrounding with time is very high.

গ

Temperature difference between the surrounding and the body is independent cooling rate

ঘ

All of the above

According to the Newton's law of cooling, the rate of cooling or rate of loss of heat is directly proportional to-

ক

Temperature of the body.

খ

Temperature of the surroundings medium.

গ

Nature and extent of the exposed surface.

ঘ

All of the above

The value of coefficient of linear expansion depends upon-

ক

Nature of the solid

খ

Length of the solid

গ

Volume of the solid

ঘ

Area of the solid

The coefficient of the linear expansion of a bar depends upon the-

ক

Length of the bar

খ

Change in length of bar

গ

Area of the bar

ঘ

Material of the bar