What is the magnitude of the net torque


A small current loop of area A = 0.0008 m2 and moment of inertia I = 6.9e-07kgm2 carries a current  i = 0.0039A with its magnetic moment perpendicular to the Earth's magnetic field. The magnitude of the Earth's field is B = 4.2e-05T.

a). What is the magnitude of the net torque T on the loop?

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Physics: What is the magnitude of the net torque
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