compass needle
physics
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
A compass needle is a small, freely rotating magnet used to detect the direction of a magnetic field.
physics
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
A compass needle is a small, freely rotating magnet used to detect the direction of a magnetic field.