How will the magnetic flux through the coil change as the rotation occurs if B is kept constant?

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? Choose 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.

Question

Barnaby

Physics

20 February, 21:45

How will the magnetic flux through the coil change as the rotation occurs if B is kept constant?

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? Choose 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.

+2

Answers (1)

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Trystan Burns · Answer 1

C. The flux decreases because the angle between B and the coil's axis changes.

The amount of flux through the coil is maximum when the plabe of the coil is perpendicular to the magnetic field, and reduces to zero as the coil becomes "side-on to" (in the plane of) the field.