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Standard XII
Physics
Potentiometer
Question

Draw labelled circuit diagram of a potentiometer to compare emfs of two cells.
Write the working formula (Derivation not required).

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Solution
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The working formula of a potentiometer is :
E1E2=l1l2
625850_597347_ans_5715299b296149389878496154e4b15e.png

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Q1
Draw labelled circuit diagram of a potentiometer to compare emfs of two cells.
Write the working formula (Derivation not required).
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Q2
Draw a labelled circuit diagram of a potentiometer to measure internal resistance of a cell. Write the working formula. (Derivation not required).
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Q3
Describe the experiment to compare the e.m.f. of two cells using potentiometer under the following points :
(i) Labelled electric circuit diagram
(ii) Derivation of formula
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Q4
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