Exercises: Electromagnetic Induction

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

Grade 11·20 problems·~30 min·OpenStax Physics (High School)·section·sec-20-2

Work through problems with immediate feedback

Fluency Practice

A strong permanent magnet is held stationary inside a conducting loop. The flux through the loop is large but constant. What is the induced EMF?

A large EMF proportional to $B$ , since the field is strong.

A moderate EMF proportional to $\Delta B / \Delta t$ .

Zero — the flux is not changing, so no EMF is induced.

An EMF that oscillates because the electrons in the loop respond to the field.