Q. Force acting on a magnetic pole of $7.5 \times 10^{- 2}$ A-m is 1.5 N. Magnetic field at the point is
A) 20 $Wbm^{- 2}$
B) 50 $Wbm^{- 2}$
C) 112.5 T
D) 2.0 T
Explanation
(a) $B = \frac{F}{m} = \frac{1.5}{7.5 \times 10^{- 2}} = 20\ T\ or\ 20\ Wbm^{- 2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.