Blue Cross Laboratories Electrical Technician Interview Questions and Answers

A machine is a device that uses energy to perform a task. The principle of a machine is to make work easier. High voltage has advantages in power transmission.

• A machine is a mechanical or electrical device that uses energy to perform a task.

• The principle of a machine is to make work easier by multiplying force or changing the direction of force.

• Examples of machines include engines, motors, pumps, and generators.

• High vo...read more

Skin effect is the tendency of high-frequency alternating current to flow near the surface of a conductor.

• Skin effect occurs due to the self-inductance of the conductor.

• It increases with frequency and decreases with the diameter of the conductor.

• It can cause power loss and distortion in high-frequency applications.

• It is mitigated by using stranded conductors or hollow conductors.

• Example: Skin effect is a major concern ...read more