The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a batte...

The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery whose internal resistance is  If the balance point is obtained at l = 30 cm from the positive end, the e.m.f. of the battery is

Anonymous User Physics Current Electricity 08 Apr, 2020 55 views

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