Electromagnetism, Properties Of Waves, Motion, Gases & The Kinetic Theory Worksheet With Answers
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36Unit 1 – Electromagnetism
Magnetic fields
A magnetic field is a region where magnetic materials feel a force. Magnetic fields are
created by magnets, or current flowing in a wire. Here are some magnetic fields you should
know about :
A bar magnet
Notice that the magnetic field lines show three things
:
1 ) The shape of the field
S
N
2 ) The direction
– out of the North pole; into the South.
3 ) The strength of the field
– the field is stronger where
the lines are closer together.
A long, straight wire with a current flowing through it
Current direction
A magnetic field is
created around the
Plan view (bird’s-eye)
wire
Notice that the field lines get further apart the further they are from the wire, since the
magnetic field is getting weaker.
A flat coil
A long coil (solenoid)
Notice that the field lines inside the coil are almost
straight and parallel – this shows the magnetic field
has a constant strength in this region.
Also, notice that the shape is very similar to that of
the magnetic field around a bar magnet.
1
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education