Electrical Engineer Apprentice Interview Questions and Answers

Induction motor works on the principle of electromagnetic induction to produce rotational motion.

• A rotating magnetic field is produced by the stator winding

• This magnetic field induces current in the rotor winding

• The interaction between the magnetic field and the induced current produces torque, which causes the rotor to rotate

• The speed of the rotor is slightly less than the speed of the rotating magnetic field

• Induction motors are widely used in various applications such as fa...read more

Transformers are of two types - Step-up and Step-down transformers.

• Step-up transformers increase voltage while decreasing current.

• Step-down transformers decrease voltage while increasing current.

• Other types include isolation transformers, autotransformers, and instrument transformers.

• Isolation transformers are used to isolate a circuit from the power source.

• Autotransformers have a single winding and are used for voltage regulation.

• Instrument transformers are used to measure v...read more