The magnitude of the magnetic field at a distance 'R' from a long, str – McqOptions

MCQOPTIONS

1.	The magnitude of the magnetic field at a distance 'R' from a long, straight wire carrying a current 'I' is equal to ____________. ( 'µ0' is permeability of free space)
A.	μoI / (πR2)
B.	2μoI / R
C.	μoI / (2πR)
D.	μoI / R2
Answer» D. μoI / R2

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