MEDIUM

12th West Bengal Board

IMPORTANT

Earn 100

For a thermocouple, the inversion temperature is $600^{°} C$ and the neutral temperature is $320^{°} C$ . Find the temperature of cold junction

50% studentsanswered this correctly

Important Questions on Thermal Effect and Chemical Effect of Current

HARD

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 59

The thermo-emf of a thermocouple is

25 μ V / {}^{\circ}C

at room temperature. A galvanometer of

40 Ω

resistance, capable of detecting current as low as

10^{- 5} A

, is connected with the thermocouple. The smallest temperature difference that can be detected by this system is.

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 60

The thermocouple among the following that can produce maximum thermo-emf for the same temperature difference between the junctions is

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 61

A thermocouple is made from two metals, antimony and Bismuth. If one junction of the couple is kept hot and the other is kept cold, then, an electric current will

EASY

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 62

If the cold junction is held at

0 ° C

, the thermos-emf

V

Of a thermocouple varies as

V = 10 \times 10^{- 6} t - \frac{1}{40} \times 10^{- 6} t^{2}

, where

t

Is the temperature of the hot junction is

{}^{\circ}C

. The neutral temperature and maximum value of thermos-emf are

HARD

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 63

Consider the following statements A and B and identify the correct answer given below :

(A) Peltier co-efficient is numerically equal to the potential difference across the junctions of the thermocouple through which current is flowing.

(B) According to Thomson, energy is neither absorbed nor evolved at the junction of a thermocouple but is absorbed lived only along the length of both the conductors.

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 65

2 A

of current is passed through

{CuSO}_{4}

solution for

32 s

, then the number of copper ions deposited at the cathode will be

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 66

For obtaining chlorine by electrolysis a current of

10 kW

and

125 V

is used. (Electrochemical equivalent of chlorine is

0.367 \times 10^{- 6} {kgC}^{- 1}

). The amount of chlorine obtained in one minute will be

MEDIUM

12th West Bengal Board

IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 6 - Thermal Effect and Chemical Effect of Current>EXERCISE 6>Q 67

Two voltmeters, one of copper and another of silver, are joined in parallel. When a total charge

q

Flows through the voltmeters, an equal amount of metals is deposited. If the electrochemical equivalents of copper and silver are

Z_{1}

and

Z_{2}

Respectively, the charge which flows through the silver voltmeter is

For a thermocouple, the inversion temperature is 600°C and the neutral temperature is 320°C. Find the temperature of cold junction

Important Questions on Thermal Effect and Chemical Effect of Current

Learn and Prepare for any exam you want !

For a thermocouple, the inversion temperature is $600^{°} C$ and the neutral temperature is $320^{°} C$ . Find the temperature of cold junction