Question

Primary circuit of potentio meter is as shown in the diagram find current in primary.

Answer 1

Given,

$V=2v,R_{AB}=10\Omega ,L=10m,R_1=1\Omega ,R_2=20\Omega$

We kknow that $V=IR\Rightarrow I=\frac{V}{R}=\frac{2}{31}=0.064A$