Torques ₁ and ₂ are required for a magnetic needle to remain perpendicular to the magnetic fields of B₁ and B₂ at two different places. The ratio of B₁: B₂ is equal to

Step-by-step solution

Given that torques ₁ and ₂ are required for a magnetic needle to remain perpendicular to the magnetic field B₁ and B₂ . We know that, torque acting on a magnet in uniform magnetic field. =M B where, =90^ (Given) Now, ₁ ₂ = M B₁ 90^ M B₂ 90^ Hence, B₁ / B₂= ₁ / ₂