AMPLIFIER
Electric current in a wire is due to the flow of tiny charged particles inside the wire called ________________
electrons
Particles move through a wire to create _____________
electrical current
Electrons move through wires at a slow speed known as _____________.
drift speed
An electrical component that limits the flow of electrical current in an electronic circuit is ________________
a resistor
Energy is transferred ___________ when the circuit is connected to the battery
immediately
Electrons move in electrical current in a _____________ pattern.
zig zag
How does the current change direction so quickly in a computer?
sound card
A digital music file is called a __________
mp3
Attractive and repulsive forces between the magnet and the coil lead to ______________ in the speaker.
vibrations
Attractive and repulsive forces inside a speaker happen when __________ flows through the coil.
current
Electrical current causes the coil to behave like a ___________.
magnet
The ______________ can move back and forth to cause sound.
electromagnet
Headphones must be connected to a source of _________ in order to work.
electric current
A __________ is an unbroken path for electric current to follow.
circuit
How do wireless headphones work if they are not attached to a source of electric current?
batteries
Pulses of radio waves are known as __________.
bluetooth
Powerful speakers need more energy, so they will need to be plugged into ___________.
an amplifier
A ___________ is a device that can increase the electric current to produce louder sounds.
amplifier
Changing the forces in the system from repulsive to attractive forces and back again produces ____________.
sound
Electrical current always flows ________________
negative to positive
The poles of the ____________ change when the direction of current changes.
electromagnet
Changing the poles of the electromagnet switches the direction of the ________ in the field.
forces
A change in the direction of the ___________ causes changes in the poles of the electromagnet.
current
A continuous moving pattern of pressure in the air is known as a __________ signal.
analog
The current slowly changing direction back and forth is evidence of a __________ sound.
low frequency