Computer Science for IGCSE & O level - Hardware (Section 30 - No. 8)
In a microphone, what is the purpose of the copper coil?
To amplify the electrical signal.
To detect the vibrations of the diaphragm.
To create an electric current when it moves within a magnetic field.
To convert digital signals to analog signals.
解释
The copper coil moving through a magnetic field generates an electric current.