A circular coil has moment of inertia \( 0.8 \mathrm{~kg} \mathrm{~m}^{2} \) around any diameter...

A circular coil has moment of inertia \( 0.8 \mathrm{~kg} \mathrm{~m}^{2} \) around any diameter and is carrying current to produce a magnetic moment of \( 20 \mathrm{Am}^{2} \). The coil is kept initially in a vertical position and it can rotate freely around a horizontal diameter. When a uniform magnetic field of \( 4 \mathrm{~T} \) is applied along the vertical, it starts rotating, around its horizontal diameter. The angular speed the coil acquires after rotating by \( 60^{\circ} \) will be (1) math xmlns=http://www.w3.org/1998/Math/MathMLmn1... xmlns=http://www.w3.org/1998/Math/MathMLmir... (2) \( 10 \pi \mathrm{rad} \mathrm{s}^{-1} \) (3) \( 20 \mathrm{rad} \mathrm{s}^{-1} \) (4) \( 20 \pi \mathrm{rad} \mathrm{s}^{-1} \) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live