You hold a wire coil so that the plane of the coil is perpendicular to a magneti

Question

You hold a wire coil so that the plane of the coil is perpendicular to a magnetic field B? .

Part B

B? is kept constant but the coil is rotated so that the magnetic field, B? , is now in the plane of the coil. How will the magnetic flux through the coil change as the rotation occurs?

Check all that apply.

a.) The flux is unchanged because the magnitude of B? is constant. b.) The flux increases because the angle between B? and the coil's axis changes. c.) The flux decreases because the angle between B? and the coil's axis changes. d.) The flux is unchanged because the area of the coil is unchanged.

Explanation / Answer

The flux decreases because the angle between B? and the coil's axis changes.
since flux = BA Cos theta

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