Q 12-03-198JEE MainJEE Main 2021 (18 Mar, Shift 2)Easy
Consider a 72 cm long wire $AB$ as shown in the figure. The galvanometer jockey is placed at $P$ on $AB$ at a distance $x$ cm from $A$. The galvanometer shows zero deflection.
The value of $x$, to the nearest integer, is ______.
Numerical value type. Enter your answer.
Answer: 48
Balanced Wheatstone bridge: $\dfrac{12}{6} = \dfrac{x}{72 - x}$
$$x = 2(72 - x) \Rightarrow 3x = 144 \Rightarrow x = 48\ \text{cm}$$
Solution by Sreeraj P, M.Sc Physics