The current needed to achieve such a magnetic field is determined as 2.78 x 10⁵ A.
Current needed for the magnetic field
The current needed to achieve such magnetic field is calculated as follows;
B = (μNI)/(2r)
μNI = 2Br
I = (2Br)/μN
where;
- r is radius of the coil
- N is number of turns
- μ is permeability of free space
I = (2 x 37.2 x 0.47)/(4π x 10⁻⁷ x 100)
I = 2.78 x 10⁵ A
The complete question is below:
Find the current needed to achieve such a field at the center of a circular coil of radius 47.0 cm that has 100 turns.
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