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The length of potentiometer wire is 200 ...

The length of potentiometer wire is 200 cm and the emf of standard cell is primary circuit is E volts. It is employed to a battery of emf 0.4 v the balance point is obtained at l = 40 cm from positive end, the E of the battery is (cell in primary is ideal and series resistance is zone

A

4v

B

2v

C

5v

D

7v

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH SERIES-CURRENT ELECTRICITY-PRACTICE SHEET (EXERCISE - V LEVEL-I (MAIN) (Straight Objective Type Questions))
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