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How will you campare emf of two cells by...

How will you campare emf of two cells by potentiometer?

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In comparing e.m.f. of two cells by a potentiometer balance point is obtained on 5^(th) wire, the current flowing through the wire is taken

A potential gradient is created in the wire by a standard cell for the comparision of emf's of two cells in a potentiometer experiment. Which possibility of the following will cause failure of the experiment.

Which of the following statements is correct during measurement of emf of cell by potentiometer ? .

Describe the use of a potentiometer to compare the emf's of two cells by the direct method (i.e., connecting them separately).

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.

Volymeter can not be used to measure emf to a cell potentiometer can be used to measure emf of a cell because

For comparing the e.m.f.'s of two cells with a potentiometer, a standard cell is used to develop a potential gradient along the wires. Which of the following possibilities would make the experiment unsuccessful gt

MODERN PUBLICATION-CURRENT ELECTRICITY-REVISION EXERCISES (SHORT ANSWER QUESTIONS)
  1. Write a relation between current and drift velocity of electrons in a ...

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  2. State Ohm' law and deduce it from the knowledge of drift velocity of f...

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  3. How will you campare emf of two cells by potentiometer?

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  4. A set of 'n' identical resistors, each of resistance 'R' when connecte...

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  5. A wire of resistance R, length l and uniform area of cross-section A i...

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  6. A given wire having resistance R is stretched so as to reduce its diam...

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  7. Write the mathematical relation for the resistivity of a material in t...

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  8. Explain with the help of a graph the variation of conductivity with te...

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  9. Write two differences between ohmic circuit and non-ohmic circuit.

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  10. Draw a graph showing the variation of resistivity with temperature for...

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  11. Define the term resistivity of conductor. Give its SI units. Show that...

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  12. If n resistors each of resistance r are connected to get (i) maximum p...

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  13. (a) How will you represent a resistance of 3,700 + 10% ohm by a colour...

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  14. (a) A wire of resistance R, length l and area of cross-section A is cu...

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  15. State Joule's law of heating by electric current. Name the materials u...

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  16. The circuit shown in the diagram contains a battery "B" a rheostat "Rh...

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  17. Define internal resistance of a cell. Prove that r ~= ((E)/(V) - 1)R, ...

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  18. What is emf of a cell? On what factors does its value depend?

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  19. (a) Derive a relation between the internal resistance, emf and termina...

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  20. State the two Kirchhoff's laws.

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