Electrical Engineering Interview Questions and Answers
This article will give you the list of subject specific questions frequently asked during interview. For Personal profile related and experience related questions refer General engineering interview questions
Electrical engineering implies to the study of electricity, use of electrical energy and design and implementation of devices to use the electrical energy productively. It also includes generation of electricity from renewable and non-renewable energy sources. Interview question in electrical engineering include power transmission, design of devices, integrated circuits etc.
- What is electromagnetic induction?
It is the phenomenon where an electromotive force is produced by introducing a changing magnetic field to a conductor or by moving a conductor in a magnetic field
- How does a diode work?
Diodes are two-terminal semiconductors that allow energy flow in one direction only.
- What are the semiconductors used transistors?
Germanium, silicon, silicon carbide, gallium arsenide
- What is CMOS? What are its advantages?
CMOS is Complementary Metal Oxide Semiconductor. Its advantages are increased noise immunity, decreased power consumption, less heat wastages.
- Do you have product design experience?
This is a general question for most engineers where the interviewer tries to find some spots in your answer to question you back. It is to evaluate your knowledge in the design work done by you.
- What is Meissner effect?
It is the phenomenon of a magnetic field being expelled from a superconductor.
- Explain superconductivity with examples.
Superconductivity is a phenomenon where the conducting material shows zero resistivity and exhibits meissner effect. Superconductivity is observed at very low temperatures. The temperature below which a material exhibits superconductivity is called the critical temperature. Cuprate superconductors have found to show the property up to 92K. Mercury based cuprate superconductors show the property up to 130K.
- How many joules is 1 electronvolt?
1 eV is 1.602176*(10^-19) joules
- How is a megawatt electrical different from a thermal megawatt?
Megawatt electrical (MWe) indicates the electrical power generated, whereas thermal megawatt (MWt) indicates the thermal power generated.
- What is a vacuum circuit breaker?
A vacuum circuit breaker is an automated switch that is used in protecting a circuit in case of overload. It interrupts current by using a vacuum container to create an arc and breaking it as a result of increase in dielectric strength.
- What is power factor?
Power factor is the ratio of working power to apparent power.
- What s renewable energy? List some renewable energy sources.
Renewable energy is the energy generated by using naturally restorable resources. Some renewable energy sources include solar, wind, tidal and geothermal energy. Biofuels produced from biomass is also classified as a renewable energy source.
- Explain the functioning of a solar cell.
A solar cell converts energy from sunlight to electrical energy. The underlying principle is the photovoltaic effect. Solar cells are made using silicon crystals or silicon thin film wafers.
- Explain your team leading or team playing experience.
Team leading or team playing experience is a major requirement in power generation plants. People as a part of a team in a power plant get major opportunities to learn in detail the operation and maintenance procedures. A team experience is a positive factor for recruiters.