Exercises: Motors, Generators, and Transformers

Work through each section in order. Show your work where indicated.

Grade 11·21 problems·~30 min·OpenStax Physics (High School)·section·sec-20-3

Work through problems with immediate feedback

Fluency Practice

A generator coil rotates in a uniform magnetic field. How does the induced EMF vary with time as the coil rotates?

The EMF is constant because the field is uniform.

The EMF varies sinusoidally because the rate of flux change is sinusoidal.

The EMF increases linearly as the coil rotates faster.

The EMF is zero whenever the coil is parallel to the field.