Question -
Answer -
Current in the wire, I =35 A
Distance of a point from thewire, r = 20 cm = 0.2 m
Magnitude of the magnetic fieldat this point is given as:
B
Where,
= Permeability of freespace = 4π × 10–7 T m A–1
Hence, the magnitude of themagnetic field at a point 20 cm from the wire is 3.5 × 10–5 T.