# electricity

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A current loop with radius 20 cm and current 2 A is in a uniform magnetic field of 0.5 T. Considering all possible orientations of the loop relative to the field, what is the largest potential energy difference (in Joules) you can find between two orientations?

• electricity -

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?

• electricity -

p=IA= Iπr²
τ=pBsinφ (sinφ=1) =>
τ=pB

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