Electrical Engineering Interview Questions and Answers
Freshers / Beginner level questions & answers
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. Define the term 'Grounding' in electrical systems.
Grounding is the connection of electrical equipment or systems to the Earth, providing a reference point for voltages and enhancing safety.
Example:
A three-pronged power plug often includes a grounding wire for safety purposes.
Ques 3. 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.
Ques 4. Define the term 'Joule heating' in electrical circuits.
Joule heating refers to the process where electrical energy is converted into heat in a conductor due to its resistance.
Example:
Incandescent light bulbs rely on Joule heating to produce light.
Ques 5. What is the role of a voltage regulator in electronic devices?
A voltage regulator maintains a constant output voltage by adjusting its internal resistance, ensuring a stable power supply for connected devices.
Example:
Used in electronic circuits to prevent damage from voltage fluctuations.
Most helpful rated by users:
- 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.
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