Physics

Problem

Two long, parallel conductors

A

and

B

separated by

8\,\text{cm}

carry currents

I_{A}=20\,\text{A}

and

I_{B}=30\,\text{A}

in the same direction. (a) Show that there exists a point on the line joining the conductors where the net magnetic field is zero. (b) Calculate the distance of this point from conductor

A

. (c) Find the magnitude and direction of the magnetic field at the midpoint of

AB

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