To determine the internal resistance of a cell by using a potentiometer the null point is at 
when the cell is shunted by 
resistance and at a length 
. When cell is shunted by 
resistance, the internal resistance of the cell is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
When internal resistance is measured by potentiometer,
Here, 
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
The resistances in left and right gap of a meter bridge are and respectively. When the resistance…
A potentiometer wire of length is connected in series with a battery. The emf of a cell balances a…
In potentiometer experiment, null point is obtained at a particular point for a cell on potentiomet…
In balanced meter bridge, the resistance of bridge wire is . Unknown resistance is connected in l…
Two unknown resistances are connected in two gaps of a meter-bridge. The null point is obtained at …
The resistivity of potentiometer wire is metre and its area of cross-section is . If 0.2 ampere c…