Q. A very long straight wire carries a current $I$. At the instant when a charge $+ Q$ at point $P$ has velocity $\overrightarrow{V}$, as shown, the force on the charge is
A) Opposite $OX$
B) Along $OX$
C) Opposite $OY$
D) Along $OY$
Explanation
(d) Magnetic field produced by wire at the location of charge is perpendicular to the paper inwards. Hence by applying Fleming’s left hand rule, force is directed along $OY$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.