1.

The magnetic field, due to a circular coil radius a, carrying a current I, at an axial point distance z from the centre of the coil, is given by:

A. \(B=(\mu_0 ia^2)/(2(a^2 + z^2)^{3/2})\)
B. \(B=(ia^2)/(2(a^2 +z^2)^{3/2})\)
C. \(B=(\mu_0 ia^2)/(2(a^2 + z^2))\)
D. \(B=(\mu_0 ia^2)/(a^2 + z^2)^2\)
Answer» B. \(B=(ia^2)/(2(a^2 +z^2)^{3/2})\)


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