Back to Motors, Generators, and Transformers — Problem 1 · Task Set 14

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

Recall / Warm-Up

An electric motor converts electrical energy to mechanical energy. What is the fundamental physical principle that causes the coil in a motor to rotate?

Electromagnetic induction — a changing flux induces a current in the coil.

Magnetic force on a current-carrying loop creates a torque that rotates the coil.

The battery pushes current through the coil, and the current itself generates rotation.

Electrostatic attraction between the coil and the magnets causes rotation.