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What is a potentiometer?...

What is a potentiometer?

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The Potentiometer is an instument used for the measurement of potential difference.
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The null point in a potentiometer with a cell of e.m.f. xi is obtained at a distance l on the wire. Then :

How does the emf of a cell depend on the balancing length obtained in a potentiometer? Give the expression for ratio of emfs in terms of balancing lengths.

Mention any one application of potentiometer

Write two factors on which the sensitivity of a potentiometer depends.

Write the principle of working of a potentiometer. Describe briefly, with the help of circuit diagram, how a potentiometer is used to determine the internal resistance of a given cell.

Give the formula to determine internal resistance of a cell using a potentiometer.

The balance point of a potentiometer with two cells in series is at l= 250 cm. And if one cell is reversed the balance point is at l_1 = 150 cm. The ratio of emfs of the two cells is

At the instant, when potentiometer is balanced, current

A potentiometer has uniform potential gradient. The specific resistance of the material of the potentiometer wire is 10^-7 ohm metre and the current passing through it is 0.1 ampere. Cross-section of the wire is 10^-8 m^2 . The potential gradient along the potentiometer wire is

OSWAAL PUBLICATION-CURRENT ELECTRICITY -TOPIC-3 (POTENTIOMETER & APPLICATIONS) (VERT SHORT ANSWER TYPE QUESTIONS)
  1. State the underlying principle of a potntiometer.

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  2. What is a potentiometer?

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