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Give the circuit diagram of potential di...

Give the circuit diagram of potential divider.

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Rheostat can be used as a potential divider. The circuit diagram for the same in figure. By this arrangement, a desired value of potential difference V can be obtained. The battery of emf, E is connected to the lower terminals A and B of a rheostat through one way key K. The output is taken across A and S, the variable terminal. If R is the resistance of the whole rheostat, between A and B and r is the resistance between A and S, then desired potential difference,
`V=E/R r`.
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