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A potentiometer wire is connectd across ...

A potentiometer wire is connectd across the ideal battery now, the radius of potentiometer wire is doubled without changing its length. The values of potential gradient

A

increases 4 times

B

increases two times

C

does not change

D

becomes half

Text Solution

Verified by Experts

The correct Answer is:
C
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NARAYNA-CURRENT ELECTRICITY-C.U.Q
  1. Potentiometer is superior to voltmeter because

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  2. In comparing emf's of 2 cells with the helf of potentiometer, at the b...

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  3. A potentiometer wire is connectd across the ideal battery now, the rad...

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  4. In a potentiometer of ten wires each of 1m, the balance point is obtai...

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  5. If the emf of the cell in the primary circuit is doubled, with out cha...

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  6. The potential gradients on the potentiometer wire are V(1) and V(2) wi...

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  7. If the current in the primary circuit is decreased, then balancing len...

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  8. Temperature coefficient of resistance alpha and resistivity rho of a p...

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  9. A series high resistance is preferable than shunt resistance in the ga...

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  10. Sensitivity of potentiometer can be increased by

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  11. A cell of emf E and internal resistance r connected in the secondary g...

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  12. Potentiometer is an ideal instrument because

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  13. On increasing the resistance of the primary circuit of potentiometer, ...

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  14. If the value of potential gradient on potentiometer wire is decreased,...

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  15. A cell of negligible internal resistance is connected to a potentiomet...

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  16. For a potentiometer to function, the emf of the cell (E) in the primar...

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  17. The balancing lengths of potentiometer wire are l(1) and l(2) when two...

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  18. At the moment when the potentiometer is balanced,

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  19. The quantity that cannot be measured by a potentiometer is….

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  20. Assertion A potentiometer is preferred over that of a voltmeter for me...

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