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    What do you mean by RMF?
    
    
    
	21. What do you mean by RMF?
    
      - Electrical fields that rotate or change direction over time are referred to as rotating magnetic fields
- Mechanical fields that rotate or change direction over time are referred to as rotating mechanical fields
- Magnetic fields that rotate or change direction over time are referred to as rotating magnetic fields
Answer: C) Magnetic fields that rotate or change direction over time are referred to as rotating magnetic fields
    Explanation:
    Magnetic fields that rotate or change direction over time are referred to as rotating magnetic fields.