Physics · Electrical Measuring Instruments
Which of the following statements are INCORRECT about Permanent Magnet Moving Coil (PMMC) instruments? I. The torque-to-weight ratio is high, which gives high accuracy. II. A single instrument can be used for several different AC current and AC voltage ranges by directly using instrument transformers. III. The scale is uniformly divided. IV. The cost of PMMC instruments is significantly lower than that of Moving Iron (MI) instruments.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Only I and IV
- 2Only II and III
- 3Only I and III
- 4Only II and IV✓
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Only II and IV
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