Electromagnetism Flashcards
1
Q
3 magnetic materials
A
Iron, Steel, and cobalt
2
Q
Like poles…
A
Repel
3
Q
Unlike poles…
A
Attract
4
Q
Field lines run
A
From north to south
5
Q
North Pole of a compass to…
A
The North Pole of the earth so is “north seeking”
6
Q
Conventional current flows…
A
Positive to negative
7
Q
Right hand grip
A
Thumb points in direction of current, fingers show direction of magnetic field
8
Q
A solenoid is
A
A coil of insulated wire
9
Q
A magnetic field is produced in a solenoid when
A
A current is passed through the wire
10
Q
The magnetic field increases in strength when
A
The current is increased
11
Q
The magnetic field reverses its direction when
A
The current is reversed
12
Q
An electromagnet is
A
When an iron bar is inserted into a solenoid
