Electrical Machines
Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is

 3600 rpm.
 500 rpm.
  600 rpm.
 3000 rpm.

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Electrical Machines
The coil spam

 none of above.
  may or may not be exactly equal to people pitch.
 can never be equal to pole pitch.
 must be exactly equal to people pitch.

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