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In the potentiometer arrangement shown, ...

In the potentiometer arrangement shown, the driving cell D has emf `epsi` and internal resistance r. The cell C, whose emf is to be measured, has emf `epsi//2` and internal resistance 2r. The potentiometer wire is 100-cm long. If balance is obtained at the langth AJ=l.

A

`l=50 cm`

B

`lgt50 cm`

C

Balance will be obtained only if resistance of AB is `ge` r.

D

Balance cannot be obtained.

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The correct Answer is:
B, C
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RESONANCE-CURRENT ELECTRICITY-Exercise-2 (Part-3)
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  5. N cells each of e.m.f. E & internal resistance r are grouped into sets...

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  6. In the circuit shown in fig. the cell has emf 10V and internal resista...

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  7. In the network shown in fig. , points A, B, and C are at potentials of...

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  8. In the circuit shown in figure

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  9. A battery of emf E and internal resistance r is connected across a res...

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  10. Potential difference across the terminal of a non ideal battery is

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  11. A cell of emf epsilon and internal resistance r drives a current i thr...

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  12. In the given figure, E=12V, R(1)=3Omega, R(2)=2Omega" and "r=1Omega. T...

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  14. By mistake, a voltmeter is connected in series and an ammeter is conne...

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  15. A microameter has a resistance of 100 omega and a full scale range of ...

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  16. Two cells of unequal emfs epsi(1)" and "epsi(2), and internal resistan...

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  17. Three voltmeeters, all having different resistances, are joined as sho...

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  18. In the potentiometer arrangement shown, the driving cell D has emf eps...

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  19. Choose the correct alternatives

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  20. Which of the following statement/s is/are correct of a source of emf (...

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