Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
magnet
|
any object with magnetic force
|
|
|
poles
|
the parts of a magnet where the magnetic force is the strongest
|
|
|
magnetic field
|
the area of magnetic force around a magnet
|
|
|
compass
|
uses earths magnetic field to people find directions
|
|
|
electromagnet
|
a coil of wire wrapped around a metal core such as an iron bar
|
|
|
loudspeaker
|
a device that changes electrical energy into sound
|
|
|
microphone
|
a device that changes sound into electrical signals.
|
|
|
motor
|
a device that changes electrical energy into mechanical energy or motion
|
|
|
generator
|
changes mechanical energy or motion into electrical energy
|
|
|
alternating current [AC]
|
flows in one direction and then in the opposite direction.
|
|
|
direct current [DC]
|
electric current flows continuously in one direction without reversing.
|
