Electromagnetism Flashcards
What materials are affected by magnets?
Ferrous: Iron, Coblat, Nickel, Steel
What is magnetism?
When magnets attract other objects with a non-contact force
what is a permanent Magnet
when domains are in the same direction all the time
Magnetic Field
Area around magnet which has effects
Domains
Magnetic materials have atom with a charge
Where do compasses point
South pole of magnet
What is a series circuit?
Electrons flowing through only one path
What is a parallel circuit?
A circuit with branches, current divides and only part of it flows through the branch
What is a short circuit?
High volume electrical current is passed through a low-resistance path
What is voltage?
How much energy is given to electrons
What is current
Flow of electrons
Simple motor has…
- Magnet
- Coil
- Power supply
Principle of Motor
Magnetic field of magnet and field of current interact and make the wire move.
WIRE DOESN’T NEED TO BE MAGNETIC, JUST CONDUCTING
Motor Effect
Wire with current interacting with another magnetic field causing a force that pushes the wire at angles
Why does the wire in the motor spin
- Forces on both sides due to motor effect
- force on one side is opposite direction to the other side
- Commutator reverses current energy every half-turn of the coil.
