Q. In the following Wheatstone bridge $P/Q = R/S.$ If key $K$ is closed, then the galvanometer will show deflection
A) In left side
B) In right side
C) No deflection
D) In either side
Explanation
(d) Pressing the key does not disturb current in all resistances as the bridge is balanced. Therefore, deflection in the galvanometer in whatever direction it was, will stay
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.