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This document discusses the use of moving coil permanent magnet instruments as ammeters and voltmeters. It provides the key equations for calculating the internal resistance of the coil, resistance of the shunt, and factors for adjusting measurement ranges. An example problem is given for calculating errors caused by temperature changes. Moving coil permanent magnet instruments have advantages like uniformly divided scales, low power consumption, and ability to measure multiple current and voltage ranges wi

Author

Abimanyu Guntur

Language

EN