The Total solution for NCERT class 6-12
What is the magnitude of magneticforce per unit length on a wire carrying a current of 8 A and making an angleof 30º with the direction of a uniform magnetic field of 0.15 T?
Current in the wire, I =8 A
Magnitude of the uniform magneticfield, B = 0.15 T
Angle between the wire andmagnetic field, θ = 30°.
Magnetic force per unit length onthe wire is given as:
f = BI sinθ
= 0.15 × 8 ×1 × sin30°
= 0.6 N m–1
Hence, the magnetic force perunit length on the wire is 0.6 N m–1.