JEE Main 2003 — Current Electricity Question with Solution
From: AIEEE 2003
Question
The thermo of a thermo -couple is at room temperature. A galvanometer of resistance, capable of detecting current as low as is connected with the thermo couple. The smallest temperature difference that can be detected by this system is
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Let be the smallest temperature difference that can be detected by the thermocouple, then
where is the smallest current which can be detected by the galvanometer of resistance
where is the smallest current which can be detected by the galvanometer of resistance
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This is a previous-year question from JEE Main 2003, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.