How much work is done in moving a charge of coulombs from a point at 118 volts to a point at 128 volts?
10 J
20 J
1/10 J
None of these
Device used for measuring potential difference is known as ____.
potentiometer
ammeter
voltmeter
galvanometer
The production of e.m.f. by maintaining a difference of temperature between the two junctions of two different metals is known as :
Joule effect
Seebeck effect
Peltier effect
Thomson effect
When a current passes through the junction of two different metals, evolution or absorption of heat at the junction is known as :
Joule effect
Seebeck effect
Peltier effect
Thomson effect
When current is passed in antimony-bismuth couple, then :
The junction becomes hot when the current is from bismuth to antimony
The junction becomes hot when current flows from antimony to bismuth
Both junctions become hot
Both junctions become cold
A thermocouple is made of Cu and Fe. If a battery is connected in it, then :
Both junctions is at the same temperature
Both junctions become hot
One junction is hotter than the other
None of the above
Thermopile is used for :
Collecting the heat energy
The measurement of radiant heat energy
The measurement of current
The change of atomic energy into heat energy
In a thermocouple, the temperature that does not depend on the temperature of the cold junction is called :
Neutral temperature
Temperature of inversion
Both the above
None of the above
At neutral temperature, the thermoelectric power has the value :
Zero
Maximum but negative
Maximum but positive
Minimum but positive
In Seebeck series Sb appears before Bi. In a thermocouple current flows from :
Sb to Bi at the hot junction
Sb to Bi at the cold junction
Bi to Sb at the cold junction
None of the above