| ⇦ | 
| ⇨ |
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: - If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons
- Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
- A disc of radius 0.1 m is rotating with a frequency 10 rev/sec in a normal magnetic
- If alpha, beta and gamma rays carry same momentum, which has the longest
- A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then
Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If a nucleus ᴢXᴬ emits 9α and 5β-particles, then the ratio of total protons and neutrons
- Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
- A disc of radius 0.1 m is rotating with a frequency 10 rev/sec in a normal magnetic
- If alpha, beta and gamma rays carry same momentum, which has the longest
- A uniform wire of resistance 9Ω is joined end-to-end to form a circle. Then
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