DC Machines and AC Motors Quiz

What type of motor has high torque start and must have the load permanently connected?

• Compound

• Separately excited

• Shunt wound

• Series wound

How is the speed control achieved in a shunt wound (parallel) motor?

• By using a variable resistor (diverter)

• By reversing the field or armature

• By using a variable resistor (shunt field regulator)

• By reversing both field and armature

Which type of dc generator has the armature current flowing through both the field and the load?

• Series wound generator

• Shunt wound generator

• Separately excited generator

• Compound wound generator

What does the generated emf in a dc generator depend on according to Fleming's Right-hand law?

• Flux density, length of conductor, and speed of armature

• Flux density and speed of armature

• Length of conductor and speed of armature

• Flux density and length of conductor

In the equation E = BLv, if the conductor has an effective length of 1.2m and is placed in a magnetic field of 0.56T, and is moved at a velocity of 2.1 m/s, what is the generated emf?

• 1.41v

• 2.35v

• 3.14v

• 4.67v