How is e.m.f measured in a potentiometer when the circuit is closed?
Asked by | 26th Jan, 2009, 02:55: PM
First the balancing length is found for a known emf. Then the balancing length is found for an unknown emf.
Using E1/E2 = l1/l2
the unknown value can be found as other 3 variables are known.
Answered by | 28th Jan, 2009, 03:37: PM
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