Physics

Problem

A long resistance wire

AB

of length

L = 100\,\text{cm}

and resistance

10\,\Omega

is connected to a driver cell of EMF

2\,\text{V}

and negligible internal resistance. A cell of EMF

1.2\,\text{V}

is connected with a galvanometer to form a potentiometer circuit. Calculate the length from end

A

where the balance point is found.