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A cell of internal resistance 5.1 Omega ...

A cell of internal resistance `5.1 Omega` and of e.m.f. 1.5 volt balances 500 cm on a potentiometer wire. If a wire of `15Omega` is connected between the balance point and the cell, then the balance point will shift

A

To zeri

B

By 500 cm

C

By 750 cm

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • A cell of itnernal resitance 1.5 Omega and of e.m.f. 1.5 volt balances 500 cm on a potentiomter wire. If a wirr of 15 Omega is connected between the balance point and the cell, then tha balance point will shift

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    C
    By `750 cm`
    D
    None of these

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    `((R)/(R-r))`
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    `((R-r)/(R))`
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