P4.1 Magnets And Magnetic Fields

Question 1

Compass

Answer 1

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

Question 2

Domain

Answer 2

Model of a magnet which says that it is made of small magnetic regions called domains
Material is magnetic if all of these face the same direction

Question 3

Induced magnet

Answer 3

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

Magnetic field lines

Answer 4

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

Question 5

Magnetic North Pole

Answer 5

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

Question 6

Permanent magnet

Answer 6

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

Question 7

Solenoid

Answer 7

Coil of wire
Adding together all the magnetic fields of the coils of wire produces a stronger magnetic field,
than a straight piece of wire

Question 8

Tesla (T)

Answer 8

Unit of magnetic field strength, or magnetic flux density

Question 9

Magnet diagram

Answer 9

Field lines around the magnet go north to south
Field lines in the magnet go south to north
Draw at least 2 or more field lines for both in and around the magnet
. < - <
-> S————N ->
. < - <

Question 10

Can electromagnets repel

Answer 10

No as they don’t have poles

Question 11

Drawing magnetic field lines

Answer 11

Place the magnet on a sheet of plain paper, draw around it, and label the poles
Place the compass at one pole of the magnet
Draw a small dot to show where the north pole of the compass points
Move the compass so that the back of the compass arrow is at the dot you have drawn
Repeat Steps 4 and 5 until the compass reaches the other pole of the magnet