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

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 :-

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

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

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