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The document discusses measuring instruments, specifically the permanent magnet moving coil (PMMC) type of instrument. It describes how PMMC instruments work using the principles of electromagnetic force and torque. Key components include a coil mounted between the poles of a permanent magnet, springs for control torque, and damping using eddy currents. PMMC instruments can be used as ammeters, voltmeters, galvanometers, and ohmmeters. Advantages are high accuracy and uniform scale, while disadvantages incl
- Author
- Gangula Praneeth Reddy
- Language
- EN