A current of 20 mA flows in a single circular loop with a radius of 2 meters. A uniform magnetic field of 1.2 T points parallel to the plane of the loop. What is the magnitude of the magnetic moment of the loop in A-m^2?
What is the magnitude of the torque on the loop in N-m?
p=IA= Iπr²
τ=pBsinφ (sinφ=1) =>
τ=pB