A circular coil of wire consisting of 100 turns, each of radius 8 cm carries a current of 0.40 A What is the magnitude of the magnetic field B at a point 20 cm from the wire?
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Answer:
Step-by-step explanation:
B=μ
o
4πr
2πNI
=
4π×0.08
4π×10
−7
×2π×100×0.4
=3.14×10
−4
T
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