The expression for the torques in the magnetic field is given by, τ=MB‌sin‌θ Forθ=θ1 τ1=MB‌sin‌θ1...(1) Similarly, τ2‌‌=MB‌sin‌θ2 ‌‌=MB‌sin‌2‌θ1 According to thegiven condition, τ2‌‌=τ1+τ1×‌
41.4
100
‌‌=1.414τ1 ‌‌=√2τ1 So √2τ1=MB‌sin‌2‌θ1...(2) From equation (1) and (2) ‌