Electromagnetism Flashcards
What poles attract to each other?
Unlike Poles (North & South)
What poles repulse against each other?
Same Poles (South & South)
What does South & South do?
Repulsion
What does South & North do?
Attract
What does North & North do?
Repulsion
What can magnets only do?
Attract magnetic materials such as Iron, Steel, Nickel & Cobalt.
What way do magnetic filed lines point?
Point out of the North and into the south pole
When are the field lines always strongest?
Stronger near the poles since the field lines are very close together
What way are the field lines
Show the magnetic field lines on the earth
What does a electric current create?
A temporary Magentic Field
What does the right hand grip tell us?
The field direction
The thumb points in the…
direction of the current flow
What does a long straight wire create?
Circuliar field lines are set up around the wire.
How can the field lines be made stronger?
Increasing the Current
What does a Solenoid Field do?
Carries Current and therefore creates field lines.
How to make the magnetic field stronger?
- Increase the Current
- More Coils
- Insert a ‘Soft’ iron core
What is the solenoid field used for?
- Scrapyard
- Trembler Bell
- Relay
