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A wire carrying current has the configuration shown in figure. Two semi-infinite straight sections, each tangent to the same circle, are connected by a circular arc, of angle , along the circumference of the circle, with all sections lying in the same plane. What must  (in rad) be in order for  to be zero at the centre of circle?


Question ID - 153943 | Toppr Answer

A wire carrying current has the configuration shown in figure. Two semi-infinite straight sections, each tangent to the same circle, are connected by a circular arc, of angle , along the circumference of the circle, with all sections lying in the same plane. What must  (in rad) be in order for  to be zero at the centre of circle?

1 Answer - 5876 Votes

3537

Answer Key : (2) -

(2)

Magnetic field at  due to wire 1 is,

and that due to wire 2 is

Magnetic field at the centre due to circular arc subtending angle  at the centre is given by

If 



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