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The wire of potentiometer has resistanc...

The wire of potentiometer has resistance `4 Omega` and length 1m. It is connected to a cell of e.m.f. 2V and internal resistance `1 Omega`. The current flowing through the potentiometer wire is

A

0.1A

B

0.2A

C

0.4A

D

0.8A

Text Solution

Verified by Experts

The correct Answer is:
C
`I=(E)/(R+r)=(2)/(4+1)=0.4A`
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NIKITA PUBLICATION-CURRENT ELECTRICITY-Multiple Choice Questions
  1. The current, in a potentiometer wire of 100 cm length, is adjusted to ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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  15. Six cells each of e.m.f. 2 V and internal resistance 0.1Omega are conn...

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  16. Find the equivalent resistance of the network given in the figure,

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  17. Four identical resistances are joined as shown in the figure. The equi...

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  18. The length and readius of a wire is l and r respectively. Its resist...

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  19. A copper wire of length 1 m and radius is joined in series with an iro...

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  20. The internal resistance of a primary cell is 4 Omega . It generates a...

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