To obtain performance of permanent magnet synchronous motor.

1. What type of magnetic field is produced by the rotor in a Permanent Magnet Synchronous Motor (PMSM)?

a) Electromagnetic field
b) Permanent magnetic field
c) Induced magnetic field
d) Rotating magnetic field

2. Why are PMSMs known for their high efficiency at high speeds?

a) Due to their lightweight design
b) Because of reduced windage losses
c) Because they use permanent magnets
d) Due to their ability to maintain full torque at low speeds

3. Why does a PMSM require an external controller for starting?

a) It lacks a rotating magnetic field
b)It operates at a constant frequency
c) It has too high an efficiency to start on its own
d) It is not self-starting due to synchronous operation

4. How does a PMSM maintain a constant speed?

a)By adjusting its resistance automatically
b)By using feedback control to regulate voltage and frequency
c)By increasing its rotor inertia
d)By varying the number of poles dynamically

5.Which of the following is a common application of PMSMs?

a) Electric vehicles
b) Ceiling fans
c) Diesel generators
d) Washing machines