Q. A straight wire of length $0.5\ metre$ and carrying a current of $1.2\ ampere$ is placed in a uniform magnetic field of induction $2\ tesla$. The magnetic field is perpendicular to the length of the wire. The force on the wire is
A) 2.4 $N$
B) 1.2 $N$
C) 3.0 $N$
D) 2.0 $N$
Explanation
(b) $F = Bil = 2 \times 1.2 \times 0.5 = 1.2N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.