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How a battery is to be connected so that...

How a battery is to be connected so that the shown rheostat will behave like a potential divider? Also indicate the points about which output can be taken.
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The correct Answer is:
Battery should be connected across `A` and `B`. Ouput can be taken across the terminals `A` and `C` or `B` and `C`
Battery should be connected across `AB` output can be taken across the terminal `A` and `C` or `B` and `C`.
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