The strength of the magnetic field, if the current is changed to 40 A, is 0.008 T.
Magnetic Field:
The region in a space where the magnetic force is experienced by the particles is known as a magnetic field.
Given data:
The magnitude of current flow is, I = 20 A.
The strength of the magnetic field is, B = 0.004 T.
The expression for the magnetic field around a circular wire of radius r is,
................................................(1)
here, is the magnetic permeability of free space.
If the current becomes 40 A, then the new magnetic field is given as,
.................................................(2)
Taking the ratio of equation (2) and equation (1) as,
Thus, we can conclude that the strength of the magnetic field, if the current is changed to 40 A, is 0.008 T.
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