Question

A potentiometer wite is supplies a constant voltage of 3v . A cell of e.m.f 1.08v is balance by the voltage drop across 216 cm of the wire. Find the total length of potentiometer wire

Answer 1

Answer:

3 = ( 1.08 / l )× x

l= ( 1.08× 216 × 10 ^-2 ) / 3 = 0.776 meter

{ l = length of potentiometer wire & x = 216 cm }