Question

A long straight wire carries a current of 35A. what is the magnitude of the field B at a point 20cm from the wire​

Answer 1

Answer:

Current in the wire, I = 35 A  

Distance of a point from the wire, r = 20 cm = 0.2 m  

Magnitude of the magnetic field at this point is given as:  

B  

Where,  

μ0= Permeability of free space = 4π × 10–7 T m A–1  

Hence, the magnitude of the magnetic field at a point 20 cm from the wire is 3.5 × 10–5 T.

Explanation:

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