Power Grid Corporation of India AC Technician Interview Questions and Answers

Electrical refers to anything related to electricity, including the generation, distribution, and use of electrical power.

• Electrical systems involve the flow of electrons through conductors.

• Electricity is used to power various devices and equipment.

• Electrical safety is important to prevent accidents and injuries.

• Examples: wiring in buildings, power lines, circuit breakers.

Electronics is the branch of physics and technology that deals with the flow of electrons and their behavior in devices and systems.

• Electronics involves the study of electronic components such as resistors, capacitors, transistors, and integrated circuits.

• It focuses on the design, construction, and operation of electronic circuits and systems.

• Examples of electronic devices include smartphones, computers, televisions, a

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance.

• Ohm's law is named after the German physicist Georg Simon Ohm.

• The formula for Ohm's law is I = V/R, where I is the current, V is the voltage, and R is the resistance.

• Ohm's law is fundamental in understanding and analyzing electrical circuits.

• It helps in cal...read more

A circuit breaker is an electrical switch that automatically interrupts the flow of current in a circuit.

• It is designed to protect electrical circuits from damage caused by excessive current or short circuits.

• When the current exceeds a certain limit, the circuit breaker trips and interrupts the flow of electricity.

• It can be manually reset after tripping or may automatically reset once the fault is cleared.

• Circuit break...read more

Step up and step down transformers are used to increase or decrease the voltage in electrical systems.

• Step up transformers increase the voltage from the input to the output.

• Step down transformers decrease the voltage from the input to the output.

• Step up transformers have more turns in the secondary coil than in the primary coil.

• Step down transformers have fewer turns in the secondary coil than in the primary coil.

• Step ...read more