Current in the wire, I = 8 A
Magnitude of the uniform magnetic field, B = 0.15 T
Angle between the wire and magnetic field, θ = 30°.
Magnetic force per unit length on the wire is given as:
= 0.15 × 8 ×1 × sin30°
= 0.6 N m–1
Hence, the magnetic force per unit length on the wire is 0.6 N m–1.