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The current in the primary circuit of a potentiometer is 0.2 A. The specific resistance and cross-section of the potentiometer wire are `4*10^-7` ohm m and `8*10^-7` `m^2` respectively. The potential gradient will be equal to

A

1 V/m

B

0.5 V/m

C

0.1 V/m

D

0.2 V/m

Text Solution

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The correct Answer is:
C
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RESONANCE ENGLISH-CURRENT ELECTRICITY-Exrcies-3(PART-2)
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  13. When 5V potential difference is applied across a wire of length 0.1 m,...

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  15. In the following circuit the current in each resistance is

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  16. Which of the following statement is false ?

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  17. When a current of 5mA is passed through a galvanometer having a coil o...

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  18. Two batteries with emf 12 V and 13 V are connected in parallel across ...

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

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  20. On interchanging the resistances, the balance point of a meter bridge ...

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