Question -
Answer -
Current in the power line, I =90 A
Point is located below the powerline at distance, r = 1.5 m
Hence, magnetic field at thatpoint is given by the relation,
Where,
= Permeabilityof free space = 4π × 10–7 T m A–1
The current is flowing from Eastto West. The point is below the power line. Hence, according to Maxwell’s righthand thumb rule, the direction of the magnetic field is towards the South.