Q. The figure shows three long straight wires $P,\ Q$ and $R$ carrying currents normal to the plane of the paper. All three currents have the same magnitude. Which arrow best shows the direction of the resultant force on the wire $P$
A) $A$
B) $B$
C) $C$
D) $D$
Explanation
(c) The force $F_{Q}$ and $F_{R}$ are the forces applied by wires $Q$ and $R$ respectively on the wire $P$ as shown in figure. Their resultant force $F$ is best shown by $C$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.