Thermal and Chemical Effects of Electric Current Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-33

ICSEHELP On Youtube Free Update Click Here 

Thermal and Chemical Effects of Electric Current Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-33 Concept of Physics for Class-12. Step by Step Solutions of Objective -2 (MCQ-2) Questions of Chapter-33 Thermal and Chemical Effects of Electric Current (Concept of Physics) .Visit official Website CISCE for detail information about ISC Board Class-11 Physics.

Thermal and Chemical Effects of Electric Current Obj-2 HC Verma Solutions Vol-2 Class-12 Ch-33

Board ISC and other board
Publications Bharti Bhawan Publishers
Chapter-33 Thermal and Chemical Effects of Electric Current 
Class 12
Vol  2nd
writer HC Verma
Book Name Concept of Physics
Topics Solution of Objective-2 (MCQ-2) Questions
Page-Number 218

-: Select Topics :-

Question for Short Answer

Obj-1

Obj-2

Exercise


Thermal and Chemical Effects of Electric Current Obj-2 (MCQ-2) Questions

HC Verma Solutions of Ch-33  Vol-2 Concept of Physics for Class-12

(Page-217)

Question-1 :-

Two resistors of equal resistances are joined in series and a current is passed through the combination. Neglect any variation in resistance as the temperature changes. In a given time interval,

(a) equal amounts of thermal energy must be produced in the resistors

(b) unequal amounts of thermal energy may be produced

(c) the temperature must rise equally in the resistors

(d) the temperature may rise equally in the resistors

Answer-1 :-

The options (a) and (d) are correct

Explanation:

In a resistor of resistance R, current i is passed for time t then the thermal energy produced in the resistor will be given by

H = i2Rt.

Question-2 :-

A copper strip AB and an iron strip AC are joined at A. The junction A is maintained at 0°C and the free ends B and C are maintained at 100°C. There is a potential difference between .

(a) the two ends of the copper strip
(b) the copper end and the iron end at the junction
(c) the two ends of the iron strip
(d) the free ends B and C

Answer-2 :-

The options are all correct

Explanation:

The copper strip AB and an iron strip AC are joined at A and the junction A is maintained at 0°C and the free ends B and C are maintained at 100°C. In this case, there will be generation of thermo-emf between the points that are at different temperatures. Here, the two ends of the copper, the copper end and the iron end at the junction, the two ends of the iron strip and the free ends B and C are at different temperatures. Hence, there will be potential difference among them.

An electrolysis experiment is stopped and the battery terminals are reversed.

(a) The electrolysis will stop

(b) The rate of liberation of material at the electrodes will increase

(c) The rate of liberation of material will remain the same

(d) Heat will be produced at a greater rate

Answer 4 :-

The option (c) The rate of liberation of material will remain the same is correct
Explanation:

In an electrolytic cell, both the electrodes are made of the same material. Thus, on reversing the  terminals of the battery, the direction of the flow of charges will be reversed, but the rate of the electrolysis will remain the same.

Leave a comment
error: Content is protected !!