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QJEEM16Ph9036: JEE Main 2016 Physics - Class 12 JEEM16Ph9036 Solution: A magnetic dipole is acted upon by two magnetic fields which…

A magnetic dipole is acted upon by two magnetic fields which are inclined to each other at an angle of 75o. One of the fields has a magnitude of 15 mT. The dipole attains stable equilibrium at an angle of 30o with this field. The magnitude of the other field (in mT ) is close to

Multiple Choice Options

  • A 11
  • B 36
  • C 1
  • D 1060

Step-by-Step Verified Solution

For equilibrium,

net torque acting on dipole is = 0

∴   τ1 = τ2

⇒   mB1 sinθ1 = mB2 sinθ2

⇒   B2 = B1 × sin⁡30osin⁡45o

=   15 × 2 × 12 =

=  10.6 mT ≃ 11 mT

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