| ⇦ | 
| ⇨ |
A thermocouple of negligible resistance produces an e.m.f. of 40 µV/⁰C in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1 µA/div, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be
Options
(a) 0.5⁰C
(b) 1⁰C
(c) 0.1⁰C
(d) 0.25⁰C
Correct Answer:
0.25⁰C
Explanation:
I division = 1µA
Current for 1⁰C = 40µV / 10 = 4µA
1µA = 1/4 ⁰C = 0.25⁰C
Related Questions: - A transistor is operated in common emitter configuration at constant collector
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- The fossil bone has a ¹⁴C:¹²C ratio, which is [1/16] of that in a living animal
- A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically.
- If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A transistor is operated in common emitter configuration at constant collector
- A system consists of three masses m₁, m₂ and m₃ connected by a string passing
- The fossil bone has a ¹⁴C:¹²C ratio, which is [1/16] of that in a living animal
- A monoatomic gas is suddenly compressed to (1/8)th of its initial volume adiabatically.
- If A=4i+4j+4k and b=3i+j+4k, then angle between vectors A and B is
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply