Question

Magnetic field at a point d distance away from long wire due to electric current i in it is ____________

a.

µ₀i/2r

b.

µ₀i/r

c.

µ₀i/2πr

d.

µ₀i/πr

Answer: (c).µ₀i/2πr

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Q. Magnetic field at a point d distance away from long wire due to electric current i in it is ____________

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