Prepare Interview

Mock Exams

Make Homepage

# Electrical Engineering Interview Questions and Answers

Test your skills through the online practice test: Electrical Engineering Quiz Online Practice Test

### Ques 1. What is Ohm's Law?

Ohm's Law states that the current passing through a conductor is directly proportional to the voltage across its ends, provided the temperature remains constant.

Example:

`I = V/R, where I is current, V is voltage, and R is resistance.`

### Ques 2. Explain the difference between AC and DC.

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction consistently.

Example:

`Household electrical outlets provide AC, while batteries provide DC.`

### Ques 3. What is the purpose of a transformer?

A transformer is used to change the voltage of an alternating current, either increasing (step-up) or decreasing (step-down) the voltage.

Example:

`Power distribution often involves step-up and step-down transformers.`

### Ques 4. Define the term 'Power Factor'.

Power Factor is the ratio of real power to apparent power in an AC circuit, representing the efficiency of power usage.

Example:

`A power factor of 1 indicates perfect efficiency, while lower values imply inefficiency.`

### Ques 5. What is the skin effect in electrical conductors?

The skin effect is the tendency of alternating current to concentrate on the outer surface of a conductor, reducing its effective cross-sectional area.

Example:

`It becomes more significant at higher frequencies.`