Magnetic field due to currentHard
Question
What is the magnetic field at a distance R from a coil of radius r carrying current I?
Options
A.
B.
C.
D.
Solution
The magnetic field is B = 
(see application of Biot-Savart law to magnetic field at a point along axis of coil)
(see application of Biot-Savart law to magnetic field at a point along axis of coil)
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