Electromagnetism Flashcards
1
Q
What does a moving charge create
A
A magnetic field
2
Q
What is the field made up of around the wire
A
Concentric circles perpendicular to the wire, with the wire in the centre
3
Q
How can you see the magnetic field of around a wire
A
Placing a compass near a wire that is carrying a current. As you move the compass it will trace the direction of the magnetic field
4
Q
What changes the direction of the magnetic field
A
The direction of the current use the right hand thumb rule
5
Q
How do you do the right hand thumb rule
A
Point your thumb in the direction of current and curl your fingers
The direction of your fingers is the direction of the field
