Category: D.C. Motors

A. field flux only
B. armature current only
C. both A. and B.
D. none of the above

A. 100% of the previous value
B. 50% of the previous value
C. 25% of the previous value
D. 10% of the previous value
E. none of the above

A. increasing the resistance in armature circuit
B. increasing the resistance in field circuit
C. reducing the resistance in the field circuit
D. reducing the resistance in the armature circuit

A. Starter for a car
B. Drive for a water pump
C. Fan motor
D. Motor operation in A.C. or D.C

If the field winding resistance of a DC shunt motor is increases, its speed will
A. decreases
B. increases
C. remains same
D. none of the above

A. Voltage control method
B. Field control method
C. Armature control method
D. All above methods

A. reduce slightly
B. increase slightly
C. increase proportionately
D. remains unchanged

A. more than the normal speed
B. loss than the normal speed
C. normal speed
D. zero

A. D.C. shunt motor
B. D.C. series motor
C. Universal motor
D. Synchronous motor

A. independent of armature current
B. directly proportional to the armature current
C. proportional to the square of the current
D. inversely proportional to the armature current