question_answer

A current of 2 amp. flows in a long, straight wire of radius 2 mm. The intensity of magnetic field on the axis of the wire is                                                                   [MP PET 2001]

A)            \[\left( \frac{{{\mu }_{o}}}{\pi } \right)\times {{10}^{3}}\]Tesla      

B)            \[\left( \frac{{{\mu }_{o}}}{2\pi } \right)\times {{10}^{3}}\]Tesla

C)            \[\left( \frac{2{{\mu }_{o}}}{\pi } \right)\times {{10}^{3}}\]Tesla    

D)            Zero