Question:
Consider a $72 \mathrm{~cm}$ long wire $\mathrm{AB}$ as shown in the figure. The galvanometer jockey is placed at $P$ on $A B$ at a distance $x \mathrm{~cm}$ from $A$. The galvanometer shows zero deflection.
The value of $x$, to the nearest integer, is
Solution:
In Balanced conditions
$\frac{12}{6}=\frac{x}{72-x}$
$x=48 \mathrm{~cm}$