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If the current in the primary circuit of...

If the current in the primary circuit of a potentiometer wire of specific resistance is `40 xx 10^(-8)Omega` -m and area of cross-section `8 xx 10^(-6)m^(2)` is 0.5 amp. Then potential gradient of wire is –

A

` 25m V//m`

B

` 2.5 mV//m`

C

` 2.5mV//m`

D

`25V //m`

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The correct Answer is:
A
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MOTION-Electrical Instrument -EXERCISE -1
  1. Potentiometer is an ideal instrument because

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  2. A potentiometer works on the principle that

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  3. If the length of potentiometer wire is increased, then the accuracy in...

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  4. In an ammeter calibration experiment, the potentiometer is used to mea...

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  5. In potentiometer the potential gradient is –

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  6. If the potentiometer wire having resistance rho ohm/ m and I amp. curr...

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  7. Discuss the principle of potentiometer and explain the determination o...

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  8. The material of wire of potentiometer is

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  9. If the current in the primary circuit of a potentiometer wire of speci...

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  10. The p.d. between A and B is balanced at 2.036 m length of the potentio...

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  11. In the following figure, the p.d. between the points M and N is balanc...

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  12. In the foregoing question, the balancing length between the p.d. betwe...

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  13. In a potentiometer of one meter length , an unknown emf voltage source...

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  14. The voltage across the two equal resistances connected in series get b...

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

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  16. Correct diagram for the determination of internal resistance of a prim...

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  17. A potentiometer has uniform potential gradient across it. Two cells c...

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  18. A wire connected in the left gap of a meter bridge balance a 10Omega r...

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  19. With two resistance R1 and R2 (>R1) in the two gaps of a metre bridge ...

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  20. In a simple meter bridge circuit, the gaps are bridged by cord P and Q...

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