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Consider the following two statements A and B, and identify the correct choice of given answers. (A) Thermo e.m.f is minimum at neutral temperature of a thermocouple (B)When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuit
- a)A is false and B is true
- b)A is true and B is false
- c)Both A and B are false
- d)Both A and B are true
Correct answer is option 'A'. Can you explain this answer?
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Consider the following two statements A and B, and identify the correc...
Thermo e.m.f is minimum at neutral temperature of a thermocouple
- The thermo e.m.f of a thermocouple is the voltage produced when two junctions made of two different metallic wires are maintained at different temperatures.
- The thermo e.m.f is maximum when there is a large temperature difference between the two junctions.
- At the neutral temperature of a thermocouple, the two junctions will be at the same temperature, resulting in no temperature difference and hence no e.m.f.
- Therefore, the statement A is false as the thermo e.m.f is minimum at the neutral temperature of a thermocouple.
When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuit
- When two junctions made of two different metallic wires are maintained at different temperatures, a temperature gradient is established between the junctions.
- This temperature gradient causes the free electrons in the metallic wires to move from the hot junction to the cold junction, creating an electric current.
- This phenomenon is known as the Seebeck effect and is the principle behind the operation of a thermocouple.
- Therefore, the statement B is true as an electric current is generated in the circuit when two junctions made of two different metallic wires are maintained at different temperatures.
Therefore, the correct choice of given answers is option 'A', where statement A is false and statement B is true.
- The thermo e.m.f of a thermocouple is the voltage produced when two junctions made of two different metallic wires are maintained at different temperatures.
- The thermo e.m.f is maximum when there is a large temperature difference between the two junctions.
- At the neutral temperature of a thermocouple, the two junctions will be at the same temperature, resulting in no temperature difference and hence no e.m.f.
- Therefore, the statement A is false as the thermo e.m.f is minimum at the neutral temperature of a thermocouple.
When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuit
- When two junctions made of two different metallic wires are maintained at different temperatures, a temperature gradient is established between the junctions.
- This temperature gradient causes the free electrons in the metallic wires to move from the hot junction to the cold junction, creating an electric current.
- This phenomenon is known as the Seebeck effect and is the principle behind the operation of a thermocouple.
- Therefore, the statement B is true as an electric current is generated in the circuit when two junctions made of two different metallic wires are maintained at different temperatures.
Therefore, the correct choice of given answers is option 'A', where statement A is false and statement B is true.
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Consider the following two statements A and B, and identify the correct choice of given answers. (A) Thermo e.m.f is minimum at neutral temperature of a thermocouple (B)When two junctions made of two different metallic wires are maintained at different temperatures, an electric current is generated in the circuita)A is false and B is trueb)A is true and B is falsec)Both A and B are falsed)Both A and B are trueCorrect answer is option 'A'. Can you explain this answer?
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