NTA Abhyas JEE Main2020PhysicsMagnetic Properties of MatterPractice
A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75 o . One of the fields has a magnitude of 15 mT . The dipole attains stable equilibrium at an angle of 30 o with this field. The magnitude of the other field (in mT ) is close to
Options
- A1
- B11
- C36
- D1060
Correct answer
B. 11
Step-by-step solution
θ 1 + θ = 75 o M B 1 sin θ 1 = M B 2 sin θ ⇒ B 1 2 = 15 2 ⇒ B 1 = 15 2 ≈ 11 m T