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Figure 6.51 shows a simple a potentiomet...

Figure `6.51` shows a simple a potentiometer circuit for measuring a small emf produced by a thermocouple.

The meter wire `PQ` has a resistance of `5 Omega`, and the driver cell has an emf of `2.00 V`. If a balance point is obtained `0.600 m` along `PQ` when measuring an emf of `6.00 mV`,
what is the value of resistance `R`?

A

`995 Omega`

B

`1995 Omega`

C

`2995 Omega`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
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In the shown potentiometer arrangement the wire PQ has a resistance of 5 Omega and the driver cell has an emf of 2V. If a balance point is obtained at 0.6m along PQ, what is the value of resistance R(in Omega )? (Length PQ = 1m)

In the shown potentiometer arrangement the wire PQ has a resistance of 5Omega and the driver cell has an emf of 2V. If a balance point is obtained at 0.6 m along PQ, what is the value of resistance R (in Omega )? (Length PQ = 1 m)

Knowledge Check

  • In given figure, the potentiometer wire AB has a resistance of 5 Omega and length 10 m . The balancing length AM for the emf of 0.4 V is

    A
    `0.4m`
    B
    `4m`
    C
    `0.8m`
    D
    `8m`

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