A circular coil with area a and n turns is free to rotate, Ask an Expert

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A circular coil with area A and N turns is free to rotate about a diameter that coincides with the x-axis. Current I is circulating in the coil. There is a uniform magnetic field τ- in the positivey-direction. The magnitude of the magnetic field is B. (Figure)

96_A circular coil with area A and N turns.jpg

A. Calculate the magnitude of the torque τ- when the coil is oriented as shown in part (a) of the figure.

B. What is the direction of the torque when the coil is oriented as shown in part (a) of the figure?

C. Calculate the value of the potential energy U, when the coil is oriented as shown in part (a) of the figure.

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