ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

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Question # 1

In the reverse process, the working substance passes through the same stages as in the direct process and

Question # 2

The absolute temperature of the tripple point of water is

Question # 3

The process which is carried out at constant temperature is known as

Question # 4

Generally a temperature scale is established by using certain physical properties of a material which varies

Question # 5

Tick the correct pair when M denotes the molecular mass and other symbols carry usual meanings:

Question # 6

The temperature scale approved in SI units is:

Question # 7

A heat engine is that which converts

Question # 8

Real gases strictly obey gas law at:

Question # 9

No spark plug is needed in

Question # 10

The internal energy of a system does not depend upon the

Question # 11

The basis to define a temperature scale that is independent of material properties is provided by

Question # 12

In the formula P = N0KT, N0denotes:

Question # 13

Heat travels through vacuum by

Question # 14

In an adiabatic expansion, the temperature of the gas

Question # 15

Specific heat at constant pressure is greater than the specific heat at constant volume because

Question # 16

The concept of entropy was introduced into the study of thermodynamics in

Question # 17

The state in which ice, water and vapour coexists in equilibrium is called

Question # 18

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

Question # 19

Melting point of ice

Question # 20

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

Question # 21

Hotness and coldness of an object is represented in terms:

Question # 22

Truth of kinetic energy is confirmed by:

Question # 23

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

Question # 24

The volume of universal gas constant R is:

Question # 25

For the working of a heat engine, there must be

Question # 26

During the whole carnot cycle

Question # 27

If an amount of heat enters the system it could

Question # 28

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

Question # 29

The nature of thermal radiation is similar to:

Question # 30

Pressure may be define as _______ per second per unit area:

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ECAT Physics Chapter 11 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves emitted by hot bodies are called:
A. Photoelectrons
B. Alpha rays
C. Thermal radiation
D. None of these
2 The pressure of gas everywhere inside the vessel will be the same provided the gas is of
A. Non-uniform density
B. uniform density
C. high density
D. low density
3 Efficiency of carnot engine is independent of the
A. temperature of sink
B. temperature of source
C. nature of the working substances
D. none of them
4 A diatomic gas molecule has
A. translational energy
B. rotaional energy
C. vibrational energy
D. all of them
5 The value of E0in coulomb's law is:
A. 9 x 109Nm2C-2
B. 8.85 x 10-12C2N-1m-2
C. 8.85 x 10-12Nm2C-2
D. 9 x 109C2N-1m-2
6 Brownian motion increases due to
A. Increase in size of Brownian particle
B. Increase in temperature of medium
C. Increase in density of medium
D. Increase in viscosity of medium
7 If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:
A. -2 mv
B. Zero
C. 2 mv
D. mv
8 If a process cannot be retraced in the backward direction by reversing the controlling factors, it is
A. a reversible process
B. an irreversible process
C. any one of them
D. both of them
9 When two objects are rubbed together, their internal energy
A. remains same
B. decreases
C. remains the same then decreases
D. increases
10 On a cold morning a metal surface will fell colder to touch than a wooden surface, because
A. Metal has high specific heat
B. Metal has high thermal conductivity
C. Metal has low specific heat
D. Metal has low thermal conductivity

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