Question 2
;
- State two devices of a moving-coil instrument.
- State two applications for each of the following instruments
- Millimeter;
- Cathode ray oscilloscope.
- State two differences between an analogue meter and a digital meter
Observation
The expected answers were;
- Devices of a moving coil instrument:
- deflecting device
- controlling device
- 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.