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In the given figure, there is a circuit ...

In the given figure, there is a circuit of potentiometer of length AB = 10 m. The resistance per unit length is `0.1Omega` per cm. Across AB, a battery of emf E and internal resistance 'r' is connected. The maximum value of emf measured by this potentiometer is :

A

2.75 V

B

2.25 V

C

6 V

D

5 Vs

Text Solution

Verified by Experts

The correct Answer is:
D
Max. voltage that can be measured by this potentiometer will be equal to potential drop across AB.
`R_(AB) = 10 xx 0.1 xx 100 = 100` ohm
`therefore V_(AB) = 6/(20 + 100) xx 100 = 6 xx 100/120 = 5 V`
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