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A cell of negligible internal resistance...

A cell of negligible internal resistance is connected to a potentiometer wire and potential gradient is found. Keeping the length as constant, if the radius of potentiometer wire is increased four times, the potential gradient will become (no series resistance in primary) 

A

4 times

B

2 times

C

half

D

constant

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IA
  1. On increasing the resistance of the primary circuit of potentiometer, ...

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

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

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  4. For the working of potentiometer, the emf of cell in the primary circu...

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

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  6. At the moment when the potentiometer is balanced

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  7. Temperature coefficient of resistance and resistivity of a potentiomet...

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  8. Sensitivity of potentiometer

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  9. The quantity that cannot be measured by a potentiometer is ..........

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

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

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  12. Statement - (A) : Thermistor can have only negative temperature coeffi...

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  13. Statement - (A): Resistivity of insulators is about 10^22 times the re...

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  14. Statement - (A) : Series combination of cells is preferred when extern...

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  15. Statement - (A): The difference between a new torch light cell and an ...

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  16. Statement-1:- The temperature dependence of resistance is usually give...

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  17. A depolarizer essentially acts an agent which can prevent a) the cov...

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  18. The meter bridge can be used a) to determine an unknown resistance ...

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  19. Potentiometer can be used a) for measurement of emf of cell b) to ...

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  20. Sensitivity of potentiometer can be increased by a) increasing serie...

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