Q. The speed of a DC shunt motor can be increased by :

A
Increasing the resistance in the field circuit
B
Reducing the resistance in the field circuit
C
Decreasing load current
D
None of the above
Solution:
  • Speed of the DC motor is directly proportional to the back emf and inversely proportional to the flux produced by field.
  • Where, flux produced is directly proportional to the current passing through the field winding (linear magnetization).
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