Basic Electricity 2, WASSCE (PC), 2016

Question 2

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  1. State two devices of a moving-coil instrument.
  2. State two applications for each of the following instruments
  3. Millimeter;
  4. Cathode ray oscilloscope.
  5. State two differences between an analogue meter and a digital meter

Observation

 The expected answers were;

  1. Devices of a moving coil instrument:
  2. deflecting device
  3. controlling device
  4. damping device

 

(c) Difference between an analogue and a digital meter

  • An analogue meter has a pointer and a scale while a digital meter has LCD or LED to display their values.
  • An analogue meter gives instantaneous values while a digital meter gives numeric values.
  • A digital meter is easier to read compared to an analogue meter.
  • An analogue meter has moving parts while a digital meter has static components.
  • An analogue meter works on electromagnetic induction while a digital meter does not.
  • A digital meter is more expensive

                                                                                                
Many of the candidates performed well in this question.