Electrical Engineering · Electrical Measurements and Instrumentation
A Permanent Magnet Moving Coil (PMMC) instrument experiences errors due to high ambient temperatures. What is the primary cause?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Change in spring stiffness
- 2Expansion of the coil
- 3Magnetic field weakening
- 4Resistance variation in the moving coil✓
Correct answer
Resistance variation in the moving coil
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