IIT Jam Physics Study Material. We covered all the IIT Jam Physics Study Material in this post for free so that you can practice well for the exam.
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IIT Jam Physics QnA for Students
dU = 0 is true for
(A) Isochoric process
(B) Isobaric process
(C) Isothermal process
(D) Adiabatic process
Option c – Isothermal process
dQ = dU is true for :
(A) Isothermal process
(B) Cyclic process
(C) Isochoric process
(D) Adiabatic process
Option c – Isochoric process
An ideal gas undergoing isothermal expansion means :
(A) Its heat content remains constant
(B) Its temperature and heat content remains constant
(C) Its temperature remains constant
(D) Its volume remains constant
Option b – Its temperature and heat content remains constant
During an isothermal process, which of the following is not true? :
(A) Temperature remains constant
(B) There is no change in internal energy
(C) No heat enters or leaves the system
(D) The process is slow
Option c – No heat enters or leaves the system
A gram mole of an ideal gas expands adiabatically from an initial temperature T₁ to a final temperature T₂ (T₁ > T₂). Then the work done by the gas is :
(A) Cv (T₁-T₂)
(B) Cp (T₁-T₂ )
(C) 1
(D) Zero
Option a – Cv (T₁-T₂)
In the isothermal process, given heat is used to
(A) Increasing temperature
(B) Doing external work
(C) Increase temperature and doing external work
(D) Increase internal energy
Option b – Doing external work
dU = -dW is true for :
(A) Isothermal process
(B) Adiabatic process
(C) Isobaric process
(D) Isochoric process
Option b – Adiabatic process
The thermodynamical system goes from state (i) P₁, V to 2P₁, V (ii) P₁, V to P₁, 2V then the work done in the two cases is :
(A) (i) zero (ii) zero
(B) (i) zero (ii) P₁V
(C) (i) P₁V (ii) zero
(D) (i) P₁V (ii) P₁V
Option b – (i) zero (ii) P₁V
In adiabatic expansion :
(A) dU = 0
(B) dU = negative
(C) dU = positive
(D) dW = 0
Option b – dU = negative
An adiabatic process occurs at constant :
(A) Temperature
(B) Pressure
(C) Heat
(D) Temperature and pressure
Option c – Heat
1 gram of an ideal gas expands isothermally, heat flow will be :
(A) From the gas to the outside atmosphere
(B) From the outside atmosphere to the gas
(C) Zero
(D) Both ‘a’ and ‘b’
Option b – From the outside atmosphere to the gas
In an isothermal change, an ideal gas obeys :
(A) Boyle’s law
(B) Charle’s law
(C) Gay Lussac law
(D) Stefan’s law
Option a – Boyle’s law
Arrange in ascending order of work done by the gas :
(A) Adiabatic > Isothermal > Isobaric
(B) Isobaric > Isothermal > Adiabatic
(C) Adiabatic > Isobaric > Isothermal
(D) Adiabatic << Isobaric < Isothermal
Option b – Isobaric > Isothermal > Adiabatic
When a gas expands adiabatically :
(A) No energy is required for expansion
(B) Energy is required and it comes from the container of the gas
(C) Internal energy of the gas is used in doing work
(D) Law of conservation of energy does not hold
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