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In a simple electric generator, a conducting loop of wire is placed in a magnetic field. The loop of wire is then rotated. Why is it necessary for the wire to be rotated?

A. Its motion through the magnetic field creates a current in the wire.

B. Its motion removes the magnetic field by using up the magnetic energy.

C. Its motion when it moves upward changes gravity into magnetism.

D. Its motion through the air transforms heat into magnetism.

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.