Heat Transfer Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-28

Heat Transfer Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-28 Concept of Physics for Class-12. Step by Step Solutions of Objective -2 (MCQ-2) Questions of Chapter-28 Heat Transfer (Concept of Physics) .Visit official Website CISCE for detail information about ISC Board Class-11 Physics.

Heat Transfer Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-28

Board ISC and other board
Publications Bharti Bhawan Publishers
Chapter-28 Heat Transfer
Class 12
Vol  2nd
writer HC Verma
Book Name Concept of Physics
Topics Solution of Objective-2 (MCQ-2) Questions
Page-Number 97, 98

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Question for Short Answer

Objective-II

Exercise (update soon)


Heat Transfer Obj-2 HC Verma Solutions 

Solutions of Ch-28 Obj-2 (MCQ-2)  Vol-2 Concept of Physics for Class-12

(Page-97)

Question-1 :-

One end of a metal rod is dipped in boiling water and the other is dipped in melting ice.

(a) All parts of the rod are in thermal equilibrium with each other.

(b) We can assign a temperature to the rod.

(c) We can assign a temperature to the rod after steady state is reached

(d) The state of the rod does not change after steady state is reached

Answer-1 :-

The option (d) The state of the rod does not change after steady state is reached is correct
Explanation:

The heat transfer will take place from the hot end to the cold end of the rod via conduction. So, with time, the temperature of the rod will increase from the end dipped in boiling water to the end dipped in melting, until it comes in equilibrium with its surroundings. In steady state, the temperature of the rod is nonuniform and constant, maximum at the end dipped in boiling water and minimum at the end dipped in melting ice.
Equilibrium means that the system is stable. So, all the macroscopic variables describing the system will not change with time. Hence, the temperature of the rod will become constant once equilibrium is reached, but its value is different at different positions of the rod.

Question-2 :-

A blackbody does not
(a) emit radiation
(b) absorb radiation
(c) reflect radiation
(d) refract radiation

Answer-2 :-

The options (c) and (d) are correct
Explanation:

A black body is an ideal concept. A black body is the one that absorbs all the radiation incident on it. So, a black body does not reflect and refract radiation.

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