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A shunt generator builds up its voltage from

  • A.the residual magnetism of its poles
  • B.an external supply connected briefly to its field
  • C.the mechanical energy of the prime mover alone
  • D.the capacitance of the connected load

Answer: A

A small residual flux generates a small emf, which drives a small field current, which increases the flux, and the process runs up the magnetisation curve until it meets the field resistance line. Without residual magnetism nothing starts.

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