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

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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