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Assertion A potentiometer is preferred o...

Assertion A potentiometer is preferred over that of a voltmeter for measurement of emf of a cell
Reason potentiometer does not draw any current from the cell.

A

Both (A) and (R) are true and (R) is the correct explanantion of A.

B

Both (A) and (R) are true but (R) is not the correct explanation of A.

C

(A) is true but (R) is false

D

(A) is false but (R) is true.

Text Solution

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The correct Answer is:
A
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NARAYNA-CURRENT ELECTRICITY-C.U.Q
  1. In comparing emf's of 2 cells with the helf of potentiometer, at the b...

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

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

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

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

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

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

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

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  9. Sensitivity of potentiometer can be increased by

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

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  11. Potentiometer is an ideal instrument because

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

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

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

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

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

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  17. At the moment when the potentiometer is balanced,

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

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

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  20. Assertion: The emf of the cell in secondary circuit must be less than ...

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