Question

A current of 1.5 A is flowing through a triangle, of side 9 cm each. The magnetic field at the centroid of the triangle is :

(Assume that the current is flowing in the clockwise direction.)

(1) 3 × 10^–7 T, outside the plane of triangle

(2) 2√3 × 10^–7 T, outside the plane of triangle

(3) 2√3 × 10^–5 T, inside the plane of triangle

(4) 3 × 10^–5 T, inside the plane of triangle

Answer 1

Correct answer is 4.

Current is flowing in clockwise direction so, \(\vec{B}\) is inside plane of triangle by right hand rule.