magnet
eletromagnet
L7 vocabalary
generator
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100
They are two poles of magnetic force.
What is N and S?
100
it is a coil of wire wrapped around a metal core, such as an iron bar.
What is an electromagnet?
100
it is an instrument that uses Earth's magnetic field to help people find directions.
What is a compass?
200
any object with magnetic force
What is a magnet?
200
Michael Faraday and Joseph Henry
Who are the scientists that discovered about electric currents and magnets?
200
applications of electromagnet are
What are the applications of electromagnet?
300
The force that pushes magnets apart or pulls the together.
What is a magnetic force?
300
It's a device that changes electrical energy into sound.
What is a loudspeaker?
400
the part of a magnet where the magnetic force is strongest are called
What is the magnetic poles?
400
It is a device that uses a magnet to convert sound into electrical signals.
What is a microphone?
400
If you dropped a box of needles, would you rather pick them up with a permanent magnet or an electromagnet? why?
which is permanent magnet?
500
It is the area of magnetic force around a magnet.
What is a magnetic field?
500
electric guitars, power plant generator, trains, toy cars,doorbells, vacuum cleaners, and dishwashers.
What are the applications of electromagnets?
500
It's the part of the loudspeaker that vibrates to create sound
What is a diaphragm?
500
It flows through a wire produces a magnetic field around the wire.
What is electric current?
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