Magnetic fields Flashcards
1
Q
What is a magnetic field?>
A
- region where a force is exerted on magnetic materials
2
Q
What are flux lines? What are they used for?
A
- magnetic fields can be re[resented by field lines
- also called flux lines
3
Q
Which direction do field lines gop?
A
north to south
4
Q
What does the closeness of the lines represent?
A
- closer the lines, the stronger the field
5
Q
How is a magnetic field induced around a wire?
A
- when current flows in a wire or any other long straight conductor, a magnetic field is induced around the wire
6
Q
What do the magnetic field lines look around the wire?
A
cocentric circles
7
Q
How is the dfirection of a magnetic field around a current-carrying wire worked out?
A
- using the right hand rule
8
Q
What happens to the field if you loop the wire into a coil (solendoid)
A
- doughnut shaped field
- forms a field like a bar magent
