Question -
Answer -
Magnitude of one of the magneticfields, B1 = 1.2 × 10−2 T
Magnitude of the other magneticfield = B2
Angle between the twofields, θ = 60°
At stable equilibrium, the anglebetween the dipole and field B1, θ1 =15°
Angle between the dipole andfield B2, θ2 = θ − θ1 =60° − 15° = 45°
At rotational equilibrium, thetorques between both the fields must balance each other.
∴Torque due to field B1 = Torque due tofield B2
MB1 sinθ1 = MB2 sinθ2
Where,
M =Magnetic moment of the dipole
Hence, the magnitude of the othermagnetic field is 4.39 × 10−3 T.