Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 27

EASY

NEET

IMPORTANT

Earn 100

What is the dimensional formula for thermal resistance?

50% studentsanswered this correctly

Important Questions on Thermal Properties of Matter

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 29

Four rods of same material with different radii

r

and length

l

are used to connect two reservoirs of heat at different temperatures. Which one will conduct maximum heat?

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 30

Two walls of thickness

d_{1}

and

d_{2}

and thermal conductivity

K_{1}

and

K_{2}

are in contact. In the steady state, if the temperatures at the outer surface are

T_{1}

and

T_{2}

, the temperature at the common wall is:

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 31

A cylinder of radius

R

, made of a material of thermal conductivity

K_{1}

, is surrounded by a cylindrical shell of inner radius

R

and outer radius

2 R

made of a material of thermal conductivity

K_{2}

. The two ends of combined system are maintained at two different temperatures. If there is no loss of heat across cylindrical surface and the system is in steady state then, calculate the effective thermal conductivity of the system.

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 34

In gravity free space heat transfer is not possible by

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 36

A polished metal plate with a rough black spot on it is heated to high temperature and quickly taken into a dark room. Then

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 41

A black body, which is at a high temperature

T K

, thermal radiation emitted at the rate of

E W m^{- 2}

. If the temperature falls to

\frac{T}{4} K

, the thermal radiation emitted in

W m^{- 2}

will be

MEDIUM

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 42

A sphere, a cube and a thin circular plate, all made of the same mass and finish are heated to a temperature of

200 ° C

. Which of these objects will cool slowest, when left in air at room temperature?

EASY

NEET

IMPORTANT

Gamma Question Bank for Medical Physics>Chapter 11 - Thermal Properties of Matter>Assignment>Q 45

The value of solar constant is