Along straight wire carries a current of 10.5 a. a second wire is bent into a loop, with a radius of r = 7.5 cm. the wire loop is held at a distance d = 3.0 cm away from the long straight wire. find the magnitude and direction of the currrent in the loop which will produce a net magnetic field of 6.7 x 10-6 t out of the page at the center of the loop.

i = 3.18 A  anticlockwise

Explanation:

magnetic field due to wire at centre

Current in the loop can be determined by using magnetic field formula in centre of loop

total net magnitude is given as 6.7*10^[-6} T

SO WE HAVE

solving above equation we get

i = 3.18 A anticlockwise to have magnetic field direction out of the page

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