# XII_Physics_Current Electricity_3 Online Test

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
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
Device used for measuring potential difference is known as ____.
potentiometer
ammeter
voltmeter
galvanometer
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
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
At neutral temperature, the thermoelectric power  has the value :
Zero
Maximum but negative
Maximum but positive
Minimum but positive
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
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
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
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
Description:

This test consist of 10 questions.Students should ideally take 10 minutes to complete the test. This test is useful for those students who are preparing for IIT JEE, AIEEE or any other engineering entrance test. This test consist of questions from Current Electricity and which, in general, is focused in AIEEE and IIT JEE. In this chapter, Cells, emf and internal resistance are key topic and mostly application based questions are asked.

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