A thermocouple of negligible resistance produces an e.m.f. of 40 µV/°C in the linear range of temperature. A galvanometer of resistance 10 ohm whose sensitivity is 1µA/div, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be:
Text Solution
Verified by ExpertsThe correct answer is:
D
For minimum deflection of 1 division require current 
Voltage required 
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A galvanometer having a coil resistance of 60 Ω Ω shows full scale deflection when a current of 1.0…
A student measures the terminal potential difference (V) of a cell (of emf ε and internal resistanc…
See the electrical circuit shown in this figure. Which of the following equations is a correct equa…
In the circuit shown in the figure, if potential at point A is taken to be zero the potential at po…
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The…
In the circuit shown the cells A and B have negligible resistances. For V A = 12V, R 1 = 500 Ω Ω an…