The magnitude of magnitic field at a point due to a current carrying small element does not depend open

Options

A. current in the element
B. length of the element
C. diameter of the element
D. distance of the point from the element

Answer

C

Explanation

We know from the Biot-Savart's law that magnitude of magnetic field at a point due to a current-carrying small element
`bar(dB) = (mu_(0))/(4pi)(idl sin theta)/(r^(2)) prop (idl)/(r^(2))`
(Where i = current in the element, l = length of the element and r = distance of the point from the element) .
`:.` Magnitude of magnetic field at a point due to a current carrying small element does not depend upon the diameter of the element .