Physics for IGCSE & O level - Magnets And Currents (Section 7 - No. 22)
What is the definition of the magnetic field lines?
The lines indicating the strength of a magnet
The lines showing the direction a compass needle would point.
The boundary of the magnetic field.
The lines that determine the polarity of a magnet
คำอธิบาย
Magnetic field lines show which direction a compass would point.