A current carrying, straight wire is kept along the axis of a circular loop carrying a current. The straight wire.
There won’t be any magnetic force acting on the wire in this case because, according the Cork-Screw rule, the magnetic field due to the straight wire will be parallel or anti parallel to the direction of current in the loop, thus creating an angle of 0 or ϖ with the direction of current.
According to F = ILBsinϴ
Where
I is the current,
L is the length of the wire
B is the magnitude of the magnetic field.
for ϴ = 0 or ϖ, F= 0.