A galvanometer contains many coils of wire wrapped around a free-spinning magnetic compass needle. The current-carrying coil creates a magnetic field and deflects the needle.
Work Step by Step
This is discussed on page 461.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.