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My question is:  how do you know that perpendicular to the magnetic field is 90 degrees in...

My question is:  how do you know that perpendicular to the magnetic field is 90 degrees in this example? Bc in another problem the circle and the square were both perpendicular to magnetic field (It was 0 degrees).

A circular coil (950 turns, radius ? 0.060 m) is rotating in a uniform magnetic field. At t ? 0 s, the normal to the coil is perpendicular to the magnetic field. At t ? 0.010 s, the normal makes an angle of ? ? 45? with the field because the coil has made one-eighth of a revolution. An average emf of magnitude 0.065 V is induced in the coil. Find the magnitude of the magnetic field at the location of the coil.

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genius_generous answered 2 years ago
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