Correct option is C
Moving Iron Instruments:
· Moving iron instruments are used to measure AC and DC currents and voltages. They operate based on the principle that a piece of iron moves in response to the magnetic field generated by the current flowing through a coil.
Types of Errors in Moving Iron Instruments:
· Stray Magnetic Field Error: External magnetic fields can affect the accuracy of the instrument by distorting the magnetic field within the instrument.
· Hysteresis Error: Hysteresis occurs due to the magnetic properties of the iron core, leading to errors in measurements, particularly when the instrument is used with AC.
· Temperature Error: Variations in temperature can affect the resistance of the coil and the magnetic properties of the iron, leading to errors in the readings.
