The speed of a D.C. shunt motor can be increased by Options: A . &nbspIncreasing the resistance in armature circuit B . &nbspIncreasing the resistance in field circuit C . &nbspReducing the resistance in the field circuit D . &nbspReducing the resistance in the armature circuit

The speed of a D.C. shunt motor can be increased by

Question

The speed of a D.C. shunt motor can be increased by

Options:

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

Answer: Option B

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Question 1. The armature voltage control of D.C. motor provides....

Question 2. Starters are used with D.C. motors because....

Question 3. If I2 be the armature current, then speed of a D.C. shunt motor is....

Question 4. In case of D.C. shunt motors the speed is dependent on back e.m.f. only because....

Question 5. A direct on line starter is used: for starting motors....

Question 6. The ratio of starting torque to full-load torque is least in case of....

Question 7. For starting a D.C. motor a starter is required because....

Question 8. Which of the following method of speed control of D.C. machine will offer minimum efficiency?....

Question 9. A D.C. series motor is that which....

Question 10. Sparking at the commutator of a D.C. motor may result in....

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