Practise comparing magnetic field strength from field-line spacing, selecting the strongest or weakest position and justifying the choice from a diagram.
Students are asked for a statement about magnetic fields.
Three statements are listed.
1 A magnetic field is described as a region in which a stationary electric charge experiences a force.
2 The direction of a magnetic field at a point is the direction of the force on an S pole at that point.
3 The relative strength of a magnetic field is shown by the spacing of the magnetic field lines.
Which statements are correct for magnetic fields?
1, 2 and 3
1 and 2 only
2 and 3 only
3 only
D