The Motor Effect (AQA GCSE Physics): Flashcards
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Practise the cards
13 cards from this deck
What do loudspeakers do?
What do loudspeakers do?
Convert electrical signals into sound
How do loudspeakers relate to microphones?
How do loudspeakers relate to microphones?
Work in reverse to microphones
Where does current flow in a loudspeaker?
Where does current flow in a loudspeaker?
Through a coil of wire
What provides the magnetic field in a loudspeaker?
What provides the magnetic field in a loudspeaker?
A permanent magnet
What causes the coil to move in a loudspeaker?
What causes the coil to move in a loudspeaker?
Interaction between magnetic fields of coil and magnet
What does the moving coil push/pull in a loudspeaker?
What does the moving coil push/pull in a loudspeaker?
The cone (or diaphragm)
How is sound created in a loudspeaker?
How is sound created in a loudspeaker?
Cone creates pressure variations in air
How do headphones compare to loudspeakers?
How do headphones compare to loudspeakers?
Similar function but on a smaller scale
What is the role of the coil of wire?
What is the role of the coil of wire?
Where electric current flows
What is the role of the magnet?
What is the role of the magnet?
Provides magnetic field to interact with coil
What is the role of the diaphragm?
What is the role of the diaphragm?
Moves to create sound waves
How do dynamic headphones work?
How do dynamic headphones work?
Use a moving coil and magnet
How do electrostatic headphones work?
How do electrostatic headphones work?
Use electrically charged plates and diaphragm