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The potentiometer wire of resistance R i...

The potentiometer wire of resistance R is connected in series with a cell of e.m.f. E and of resistance `R_(h)`. The current flowing through the potentiometer wire is

A

`I=(E)/(R+r+R_(h))`

B

`I=(E)/(R+r)`

C

`I=(RE)/(R_(h)+r)`

D

`I=(E)/(R)`

Text Solution

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The correct Answer is:
A
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NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions
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  2. Instead of voltmeter, potentiometer is always used to measure e.m.f. ...

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  4. Potentiometer is used to

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  5. The internal resistance of a cell by potentiometer is given by

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  6. In potentiometer experiment to determine internal resistance of the ce...

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  7. The current, in a potentiometer wire of 100 cm length, is adjusted to ...

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  8. In given figure, the potentiometer wire AB has a resistance of 5 Omeg...

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  9. The wire of potentiometer has resistance 4 Omega and length 1m. It i...

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  10. A potentiometer has a uniform wire of length 10m and resistance 5 Ome...

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  11. A voltmeter has a resistance of 50 Omega is connected across a cell ...

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  12. With a potentiometer null point were obtained at 140 cm and 180 cm w...

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  13. In a potentiometer experiment it is found that no current passes throu...

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  14. The potential gradient along the length of a uniform wire is 5 V/m. Th...

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  15. In figure AB is a potentiometer wire of length 10 m and resistance 1...

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  16. In figure, AB is a potentiometer wire, length 10 m and resistance 2 Om...

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  17. A plantinum wire has resistance of 10 Omega at 0^(@)C and 20 Omega at ...

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  18. In the adjacent circuit the ammeter reads 5.0 A and voltmeter reads 20...

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  19. Following are the readings of potential and current through a specimen...

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  20. In a potentiometer experiment the balancing length is 8 m, when the tw...

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