460. Problem 35.14 (RHK) A straight section of wire of length L carries a current
(b) We have to show that the magnetic field is zero at point Q, along the line of the wire. |
Solution: Click For PDF Version Using the Biot-Savart law we write the expression for the magnetic field at
the point P due to an infinitesimal segment of wire of length
where
But Therefore, We make the following substitution in the integral We get where we have used (b) As the point Q is along the line segment carrying the current
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