AB is a potentiometer wire of length 100 cm and its resistance is 10 o – McqOptions

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1.	AB is a potentiometer wire of length 100 cm and its resistance is 10 ohms. It is connected in series with a resistance R = 40 ohms and a battery of e.m.f. 2 V and negligible internal resistance. If a source of unknown e.m.f. E is balanced by 40 cm length of the potentiometer wire, the value of E is [MP PET 2001]
A.	0.8 V
B.	1.6 V
C.	0.08 V
D.	0.16 V
Answer» E.

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