Magnets Flashcards
How can invisible magnetic fields be revealed
Iron filings / a plotting compass
What is an electromagnet
A magnet that uses an electrical current to generate a magnetic fiels
What are the three ways to strengthen an electromagnet
Increase current
Increase the number of turns of the coil
Add an iron core
What is the coil of the wire with many turns called
A solenoid
What is the motor effect
When the force on a current-carrying wire near a permanent magnet cause the wire to move
What are the two ends of a magnet called
North / South Pole
In an electrical motor, what will happen if the current direction is reversed
The direction of the rotation will reverse
What do magnetic field lines look like
Circular
Name four magnetic materials
Iron
Steel
Cobalt
Nickel