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If specific resistance of a potentiomete...

If specific resistance of a potentiometer wire is `10^(–7) (Omega)` m and current flow through it is 0.1 A, cross-sectional area of wire is `10^(–6) m^2` then potential gradient will be : -

A

II

B

V

C

VI

D

I

Text Solution

Verified by Experts

The correct Answer is:
C, D
`v_(cm)` is not zero in graph (I), (III) and (VI)
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ALLEN-CURRENT ELECTRICITY-EXERCISE-III
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  6. A potentiometer having the potential gradient of 2 mV/cm is used to me...

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  7. A microammeter has as resistance of 100 Omega and full scale range of ...

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  8. In the circuit shown here, what is the value of the unknown resistor R...

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  9. A battery has e.m.f. 4 V and internal resistance r . When this battery...

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  10. In the circuit shows here, E(1) = E(2) = E(3) = 2V and R-(1) = R(2) = ...

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  11. AB is a potentiometer wire of length 100cm and its resistance is 10ohm...

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  13. A battery of electro motive force E is connected in series with a resi...

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  14. The resistance wires on joining in parallel, the resultant resistance ...

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  15. The temperature coefficient of resistance of a wire is 0.00125 per ^@C...

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  16. If specific resistance of a potentiometer wire is 10^(–7) (Omega) m an...

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  17. The resistance of each arm of the wheat stone bridge is 10Omega. A r...

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  18. Copper and silicon is cooled from 300 K to 60 K, the specific resistan...

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  19. There is a current of 40 A in a wire of 10^(-6) square metre area of c...

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