The Wheatstone bridge is an arrangement of four resistances, say $R_1, R_2, R_3$ and $R_4$. The null point condition is given by:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → $R_1/R_2=R_3/R_4$
In a Wheatstone Bridge, the null point (Balanced point) is achieved when,
$\frac{R_1}{R_2}=\frac{R_3}{R_4}$
