1) A non planar loop of conducting wire carrying a current I is placed as shown .Each of the straight section of the loop have a length = 2a. The magnetic field due to this loop at the point P (a,0,a) points in the direction ---

A) 1/√2*(-j + k) B) 1/√3*(-j + k +i) C) 1/√3*(i + j + k) D) 1/√2*(i + k)

(i, j, k represent the respective Unit vectors)

2) A current of 1A is passed thro' a straight wire of length 2mt. The magnetic field at a point in air at a distance of 3mt from either side of the wire & lying on the axis of wire will be ?

Amit Saxena , 11 Years ago

Grade upto college level