When the hot and cold junctions of a thermo couple are interchanged then the thermo emf

An emf of 1 V is developed when the temperature difference between the hot and cold junctions of a thermocouple is 100 K. Assuming that the cold junction is heated by 20 K , determine the percentage change in the thermo emf.

Assertion : Thermocouple acts as a heat engine. Reason : When two junctions of thermocouple are at different temperature, thermo e.m.f. is produced.

Assertion: When temperature of cold junction of a thermocouple is lowered, the value of neutral temperature of this thermo couple is raised. Reason: When the difference of temperature of two junction is raised. More thermo emf is produced.

Assertion: When temperature of cold junction of a thermocouple is lowered, the value of neutral temperature of this thermo couple is raised. Reason: When the difference of temperature of two junction is raised. More thermo emf is produced.

Assertion: When temperature of cold junction of a thermocouple is lowered, the value of neutral temperature of this thermo couple is raised. Reason: When the difference of temperature of two junction is raised. More thermo emf is produced.

Assertion : When temperature of cold junction of a thermocouple is lowered, the value of neutral temperature of this thermocouple is raised. Reason : When the difference of temperature of two junction is raised, more thermo e.m.f. is produced.

Assertion: Thermocouple acts as a heat engine. Reason: When two junctions of thermcouple are at different temperature, thermo emf is produced.