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The emf of a cell is 2V and its internal...

The emf of a cell is 2V and its internal resistance is 2 ohm. A resistance of 8 ohm is joined to battery in parallel. This is contacted in secondary circuit of potentio meter. If IV standard cell balances for 100cm of potentiometer wire, the balance point of above cell is

A

120 cm

B

240 cm

C

160 cm

D

116 cm

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - II
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  5. When two resistances (50)/(3)Omega and unknown resistance are connecte...

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  6. In a meter bridge experiment Two unknown resistances X and Y are conne...

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  7. The emf of a battery A is balanced by a length of 80cm on a potentio m...

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  8. The balancing lengths of potentiometer wire are 800 cm and 600cm when ...

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  9. The ratio of potential gradients is 1:2, the resistance of two potenti...

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  10. When 6 identical cells of no internal resistance are connected in seri...

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  11. The balancing length for a cell is 560cm in a potentiometer experiment...

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  12. The resistivity of a potentiometer wire is, if the area of cross secti...

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  13. A potentiomete wire of 10m length and 20 Ohm resistance is connected i...

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  14. A potentiometer has a wire of 100cm length and its resistance is 10 Oh...

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  15. The length of potentiometer wire is 200 cm and the emf of standard cel...

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  16. The emf of a cell is 2V and its internal resistance is 2 ohm. A resist...

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  17. A cell in secondary circuit gives null deflection for 2.5 m length of ...

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  18. A potentiometer wire of length L and a resistance r are connected in s...

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  19. The resistance of a wire is 'R' ohm. If it is melted and stretched to ...

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  20. A set of 'n' equal resistors, of value 'R' each, are connected in seri...

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