Question:
The wire carries current of 10A. What is the magnetic field at the centre of the coil
Answer:
The magnetic field at the centre of a circular current loop (coil) is-
B=μo I/2r
Where, I is current in the coil, r is radius of circular coil and value μo of is, 4π×10-7 TmA-1
Given, I= 10 amp
So, field at the centre is, B= 4π×10-7 (10)/2r T
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