ACTIVE AND PASSIVE COMPONENTS - Practice Mode

1) What is the main problem caused for severe pitting in relays?
Correct Answer: Excessive contact current
2) What is the effect on the transformer operated below the rated voltage?
Correct Answer: Delivers reduced secondary voltage
3) What is the purpose of vacuum contactors in electrical panel?
Correct Answer: Fast switching
4) What is the reason for the use of contactors in control circuits?
Correct Answer: Supply power to loads
5) Why the transformer core is made as thin laminations?
Correct Answer: To minimize eddy current losses