1.

Write the advantages of alternator over dynamo.

Answer»
  • For same output, the alternator is much smaller in size as compared to dynamo. 
  • For same current output the alternator is lighter weight. 
  • Alternator can produce more current output at low, engine speeds, even at idling. But dynamo can’t do that. 
  • Alternator requires lesser maintenance 
  • It is more reliable
  • No cut-out unit is required in alternator. 
  • Maximum driving speed of alternator is comparatively higher (20000 rpm) than dynamo (9000 rpm). 
  •  Alternator requires smaller size of driving pulley as compared to dynamo.


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