Author Question: Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced ... (Read 126 times)

jCorn1234 · **on:** Jul 28, 2018

Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is least when:
a. the plane of the loop is perpendicular to the magnetic field. b. the plane of the loop makes an angle of 45 with the magnetic field. c. the magnetic flux through the loop is a maximum.
d. the plane of the loop is parallel to the magnetic field.

Question 2

An ore car of mass 2000 kg rolls downhill on tracks from a mine. At the end of the tracks, 10.0 m lower in elevation, is a spring with k = 400,000 N/m. How much is the spring compressed in stopping the ore car? Ignore friction.
a. 0.14 m
c. 1.40 m
b. 0.99 m
d. 1.96 m