CBSE Class 11-Physics: Heat and Thermodynamics Assignment 2 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 1:

What increase in radiated power results when the temperature of a blackbody is increased from to

a)

b)

c)

d) None of these

Question 2:

The internal energy of an ideal gas depends on

a) Temperature

b) Pressure

c) Volume

d) None of these

Question 3:

Find the Temperature at Point B

All Rod are of equal length and equal area of cross action. Find the temperature at point B

a,

b,

c,

d,

Question 4:

An ideal gas is taken through a cyclic thermodynamics process through four steps.

The amount of heat involved in the steps are respectively. The corresponding quantities of Internal energy changes are ? find the value

a,

b,

C,

d,

Question 5:

4 moles of an ideal gas undergoes an isothermal expansion at temperature during which the volume becomes times.

Workdone by the gas

Change in internal energy

a)

b)

c)

d)

Question 6:

M moles of an ideal polyatomic are in cylinder at temperature heat Q is supplied to the gas. Some moles of the gas dissociated into atoms while temperature remains constant. Find the correct relation

a)

b)

c)

d)

Question 7:

Absorbing power of the surface is. . Transmitting power of the surface is . 1 A total heat Q is incident on the surface. Find the heat reflected back?

a)

b)

c)

d)

Question 8:

A hole of radius is made centrally in a circular disc of thickness d and radius . The inner surface is maintained at temperature and other surface is maintained at . Thermal conductivity of the circular plate is .

a. Find the temperature as a function of radius from centre

b. Find the heat flow per unit time

Assertion and Reason

a) Statement I is true, statement II is true, statement II is correct explanation for statement I

b) Statement I is true, statement II is true, statement II is not a correct explanation for statement I

c) Statement I is true, Statement II is false

d) Statement I is False, Statement II is True

Question 9:

STATEMENT 1: The molar specific heat capacity of the ideal gas in isothermal process is infinity

STATEMENT 2: Heat transfer is non-zero in the Isothermal process

Question 10:

STATEMENT 1: Equation of state for a real gas is

STATEMENT 2: Molecular attraction is not legible, and the size of molecules are not negligible in comparison to average separation between them