The length of a potentiometer wire is 120 cm and it carries a current of 60 mA. For a cell of emf 5V and internal resistance of 20 Ω Ω , the null point on it is found to be at 1000 cm. The resistance of whole wire is
Text Solution
Verified by ExpertsThe correct answer is:
C
Potential gradient = 
V P = 6V
and R P = 
= 100 Ω Ω
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…
A thermocouple of negligible resistance produces an e.m.f. of 40 µV/°C in the linear range of tempe…
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…