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Reported Question / Answer
Q.) An circular coil of radius R consists of N turns of wire.The current in the wire is I.Let B is the magnetic field at the center of the coil Which of the following is true?
1)
B=µ0NI/R
2)
B=µ0I/2R
3)
B=µ0NI/4R
4)
none of this
5)
NULL
Answer :
4
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