Get premium membership and access revision papers with marking schemes, video lessons and live classes.
Processing. Please wait.

 Form 2 Physics Magnetic Effect of Electric Current Questions and Answers

The figure below shows the circuit of a simple telephone receiver. Explain how the telephone receiver works

 (1m 38s)
546 Views     SHARE

Download as pdf file

Answer Text:
The current flowing through the coil magnetizes the soft iron core and demagnetizes when current reverses. This causes the diaphragm to be attracted and released repeatedly. Thus the diaphragm vibrates converting electrical energy to sound energy.