Torques on a loop Question Loops in a magnetic field.

Torques on a loop Question

Loops in a magnetic field.

A circular loop of wire of 4 cm radius is placed in a uniform magnetic field of 3 mTesla. Let’s say that the field points in the +x direction. 

a. For what orientation of the loop, with respect to the field, is the magnetic flux through the loop a maximum? For example, should the loop be oriented so that magnetic field lines are lie in the plane of the loop i.e. like C in the figure at right?

b. If the wire has a current of 210 milliAmperes in it, for what orientation of the loop (with respect to the field) will the torque exerted on the loop by the field be a maximum?

c. What is the size and direction of maximum torque?

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