Question
Download Solution PDFMoving iron instruments are scaled at ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFMoving Iron Instrument
- MI instruments are used for the measurement of the RMS value of current and voltage.
- These instruments have a non-uniform scale.
- It works on the principle of attraction of a single piece of soft iron into the magnetic field.
- In the MI instrument, when the current is passed through the solenoid, a magnetic field is set up inside the solenoid. Then the iron piece gets magnetized which in turn deflects the pointer.
- The deflecting torque produced is directly proportional to the square of the current.
- The controlling torque is provided by the spring control.
- The damping torque is provided by air friction damping.
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