1. a
2. b
3. c
4. d
Consider the following statements regarding a thermocouple.
Statement-I: | The neutral temperature does not depend on the temperature of the cold junction. |
Statement-II: | The inversion temperature does not depend on the temperature of the cold junction. |
1. | Both Statement I and Statement II are correct. |
2. | Statement I is correct but Statement II is wrong. |
3. | Statement II is correct but Statement I is wrong. |
4. | Both Statement I and Statement II are wrong. |
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The heat developed in a system is proportional to the current through it.
1. It cannot be Thomson heat.
2. It cannot be Peltier heat.
3. It cannot be Joule heat.
4. It can be any of the three heats mentioned above.
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(A) Free-electron density is different in different metals.
(B) Free electron density in a metal depends on temperature.
Seebeck effect is caused
1. due to both A and B
2. due to A but not due to B
3. due to B but not due to A
4. neither due to A nor due to B.
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Consider the statements A and B in the previous question. Peltier effect is caused
1. due to both A and B
2. due to A but not due to B
3. due to B but not due to A
4. neither due to A nor due to B
Previous question: Consider the following two statements.
(A) Free-electron density is different in different metals.
(B) Free electron density in a metal depends on temperature.
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(A) Free-electron density is different in different metals.
(B) Free electron density in a metal depends on temperature.
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Faraday constant
1. depends on the amount of the electrolyte
2. depends on the current in the electrolyte
3. is a universal constant
4. depends on the amount of charge passed through the electrolyte
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Two resistors having 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. |
Choose the correct option:
1. | (a), (b) | 2. | (b), (c) |
3. | (c), (d) | 4. | (a), (d) |
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
Choose the option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. All of these
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(a) there will be no neutral temperature
(b) there will be no inversion temperature
(c) there will not be any thermo-emf even if the junctions are kept at different temperatures
(d) there will be no current in the thermocouple even if the junctions are kept at different temperatures.
Choose the option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)
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