Q. If the balance point is obtained at the 35$^{th}$ $cm$ in a meter bridge, the resistances in the left and right gaps are in the ratio of
A) 7 : 13
B) 13 : 7
C) 9 : 11
D) 11 : 9
Explanation
(a) Using Wheatstone principle$\ \ \frac{P}{Q} = \frac{R}{S} = \frac{R}{100 - l}$
$= \frac{35}{100 - 35} = \frac{35}{65} = \frac{7}{13}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.