P4.1 Magnetism and magnetic fields

Question 1

Define: compass

Answer 1

a small magnet that aligns in the Earth’s magnetic field to show its direction

Question 2

Define: domain (model of magnetism)

Answer 2

a model of a magnet which says that it is made of small magnetic regions called domains

Question 3

Define: induced magnet

Answer 3

a magnet that is produce when a magnetic material is placed in a magnetic field, which may or may not stay magnetic when the field is removed

Question 4

Define: magnetic field lines

Answer 4

lines that model a magnetic field; denser lines mean a stronger field

Question 5

Define: magnetic north pole

Answer 5

the place on the surface of the Earth where a compass points, not the same as geographical north

Question 6

Define: permanent magnet

Answer 6

a magnet that stays magnetic when other magnets, or an electric current, is removed

Question 7

Define: solenoid

Answer 7

a coil of wire

Question 8

Define: tesla (T)

Answer 8

the unit of magnetic field strength, or magnetic flux density