Synchronous motor

What is a synchronous motor?

• a) A motor that rotates at a constant speed

• b) A motor that rotates at a variable speed

• c) A motor that rotates in the opposite direction of the magnetic field

• d) A motor that rotates in the same direction of the magnetic field

What is the principle of operation of a synchronous motor?

• a) Electromagnetic induction

• b) Electromagnetic attraction

• c) Electromagnetic repulsion

• d) Electromagnetic synchronism

Which component of a synchronous motor generates the magnetic field?

• a) Rotor

• b) Stator

• c) Armature

• d) Commutator

How is the magnetic field in a synchronous motor generated?

• a) By using permanent magnets

• b) By using electromagnets

• c) By using a combination of permanent magnets and electromagnets

• d) By using a commutator

What is the function of the rotor in a synchronous motor?

• a) To generate the magnetic field

• b) To convert electrical energy into mechanical energy

• c) To maintain the speed of the motor

• d) To provide a path for the magnetic flux

What is the power factor of a synchronous motor?

• a) Less than 1

• b) Equal to 1

• c) Greater than 1

• d) It depends on the load

Which of the following is an advantage of using a synchronous motor?

• a) High starting torque

• b) High efficiency

• c) Low cost

• d) Low maintenance

What happens to the speed of a synchronous motor when the load is increased?

• a) The speed increases

• b) The speed decreases

• c) The speed remains constant

• d) The speed fluctuates

What is the maximum power factor that a synchronous motor can achieve?

• a) 0.5

• b) 1

• c) 2

• d) It depends on the load

What is the typical speed range of a synchronous motor?

• a) 100-500 RPM

• b) 500-1000 RPM

• c) 1000-5000 RPM

• d) 5000-10000 RPM