Electrical Engineering perguntas e respostas de entrevista
Pergunta 11. Explain the concept of electric potential.
Electric potential, or voltage, is the energy required to move a unit charge from one point to another in an electric field.
Example:
Voltage is measured in volts (V) and is a key parameter in electrical circuits.
Pergunta 12. What is the difference between a fuse and a circuit breaker?
Both are protective devices, but a fuse is a one-time-use component that melts when current exceeds a certain limit, while a circuit breaker can be reset and reused.
Example:
Fuses are common in older homes, while circuit breakers are more modern.
Pergunta 13. Explain the concept of inductance in electrical circuits.
Inductance is the property of an electrical circuit that opposes a change in current, resulting in the generation of an electromotive force (EMF).
Example:
Coils and solenoids exhibit inductance.
Pergunta 14. What is a semiconductor, and how is it used in electronic devices?
A semiconductor is a material with conductivity between that of a conductor and an insulator. It is widely used in electronic devices, such as transistors and diodes.
Example:
Silicon is a commonly used semiconductor material.
Pergunta 15. Explain the working principle of a step-up transformer.
A step-up transformer increases the voltage from the primary winding to the secondary winding, while decreasing the current.
Example:
Used in power transmission to reduce energy loss over long distances.
Mais uteis segundo os usuarios:
- What is Ohm's Law?
- Define the term 'Grounding' in electrical systems.
- Explain the concept of electric potential.
- What is the role of a voltage regulator in electronic devices?
- Explain the difference between AC and DC.