AP and TS EAMCET Engineering Model Paper 8

Question : 108 of 160

Marks: +1, -0

The length of a potentiometer wire is 1 m and its resistance is 4 Ω. A current of 5 mA is flowing in it. An unknown source of emf is balanced on 40 cm length of this wire, then the e.m.f of the source is