Question

Magnetic force on circular loop

Answer 1

Magnetic Field of Current Loop. Examining the direction of the magnetic field produced by a current-carrying segment of wire shows that all parts of the loop contribute magnetic field in the same direction inside the loop. ... Stacking multiple loops concentrates the field even more into what is called a solenoid.

Answer 2

in this case it is zero
always remember that if current is flowing symmetrically in the either side of any loop the net magnetic field is ALWAYS ZERO...

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