Q. If the strength of the magnetic field produced $10cm$ away from a infinitely long straight conductor is $10^{- 5}weber/m^{2}$, the value of the current flowing in the conductor will be
A) 5 $ampere$
B) 10 $ampere$
C) 500 $ampere$
D) 1000 $ampere$
Explanation
(a) $B = \frac{\mu_{0}}{4\pi}.\frac{2i}{r} \Rightarrow 10^{- 5} = 10^{- 7} \times \frac{2i}{(10 \times 10^{- 2})} \Rightarrow i = 5A$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.