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    What is a DC machine?
    
    
    
	69. What is a DC machine?
    
      - A DC machine is an electromechanical device that can transform direct current (dc) electricity but not vice versa
 
      - A DC machine is an electromechanical device that can transform mechanical energy into direct current (dc) electricity but not vice versa
 
      - A DC machine is an electromechanical device that can transform direct current (dc) electricity into mechanical energy and vice versa
 
    
    Answer: C) A DC machine is an electromechanical device that can transform direct current (dc) electricity into mechanical energy and vice versa.
    Explanation:
    A DC machine is an electromechanical device that can transform direct current (dc) electricity into mechanical energy or mechanical energy into direct current (dc) electricity.