Flux density
Variation
Magnetic flux lines
Dip
Transient induced magnetism
Coulomb's Law
Angle between true north and magnetic meridian at that place
Inverse square law to calculate attractive and repulsive forces between magnetic poles
Angle a freely suspended magnet makes with the horizontal
Lines of magnetic force from a magnet
The number of magnetic flux lines per square metre cross-section
A soft iron bar that has been magnetised and its poles are not permanent
