GSM Phone Maintenance and Repair Paper 2, WASSCE (SC), 2018

Question 10

 

 

  1. List three symptoms of a faulty mobile phone microphone.
  1. List three components of a mobile phone that has polarity.

 

Candidates’ performance on this question was excellent.

Observation

The expected answers are:

     

         (a)    Symptoms of a faulty mobile phone microphone

  • poor audio quality during phone call / receiver cannot hear the caller’s voice (one way conversation)
  • change in sound / callers voice is distorted to the receiver
  • sound interruption / receiver can hear the caller on some occasions but not all the time

    
(b)    Components of a mobile phone with polarity

  • backup battery
  • electrolytic / polarised capacitor
  • battery terminal connector
  • mouthpiece / microphone
  • earpiece / speaker
  • vibrator / motor
  • buzzer / ringer / loudspeaker
  • transistor
  • regulator
  • charging port
  • diode