Electrical Engineering · Electrical Instruments
Select the incorrect statement from the following options regarding moving-iron instruments.
- 1The frictional error in these instruments is very low because of a high torque-to-weight ratio.
- 2They can be used to measure both alternating current (AC) and direct current (DC).
- 3They are mechanically weak and fragile due to their overly complex construction.✓
- 4They have satisfactory accuracy levels within the limits of both precision and industrial grades.
Correct answer
They are mechanically weak and fragile due to their overly complex construction.
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