Question 5
- With the aid of a sketch, state how the range of an ammeter can be extended to read a higher value.
- List three devices of a moving-coil instrument.
- State two advantages of digital measuring instrument over moving-coil measuring instruments
Observation
The expected responses were:
-
- Devices of a moving-coil instrument
- • Operating device
- • Controlling device
- • Damping device
- Advantages of digital measuring instruments over moving coil instruments
- • Output display is easier to read
- • Readings are more accurate
- • There are no moving parts
- • It is more user friendly
Many candidates who attempted this question did the extension well, managed to list advantages but could not list the devices.