Star Wire India Interview Questions and Answers

Power transmission line is a system of structures, wires, and insulators that transmit electrical energy from a power plant to a substation.

• Power transmission lines are used to transmit high voltage electricity over long distances.

• They are made up of towers or poles that support the wires and insulators.

• The wires are usually made of aluminum or copper and are insulated to prevent electrical leakage.

• Power transmission lines can be overhead or underground depending on the locat...read more

A power plant is a facility that generates electricity by converting various forms of energy into electrical energy.

• Power plants can use various sources of energy such as coal, natural gas, nuclear, hydro, wind, and solar power.

• The energy is converted into electrical energy through generators.

• Power plants are essential for providing electricity to homes, businesses, and industries.

• They can be classified into thermal, hydroelectric, nuclear, and renewable energy power plants.

• E...read more

Alternating current (AC) is an electrical current that periodically reverses direction.

• AC is used to transmit power over long distances

• It is generated by power stations and used in homes and businesses

• AC voltage can be easily changed using transformers

• AC is measured in cycles per second, or Hertz (Hz)

DC current is the flow of electric charge in a constant direction.

• DC stands for Direct Current

• It is produced by sources such as batteries, generators, and solar cells

• DC current flows in a single direction

• It is used in electronic devices such as computers, televisions, and radios

Current is the flow of electric charge through a conductor.

• Current is measured in amperes (A)

• It is the rate of flow of electric charge

• Current flows from high potential to low potential

• It is the product of voltage and resistance (Ohm's law)

Voltage is the measure of electric potential difference between two points in a circuit.

• Voltage is measured in volts (V)

• It is the force that drives electric current through a circuit

• Higher voltage means more energy is available to move electrons

• Voltage can be either AC (alternating current) or DC (direct current)

• Examples of voltage sources include batteries, generators, and power supplies

AC current is a type of electrical current that periodically reverses direction.

• AC stands for alternating current

• It is commonly used in household electrical systems

• AC current changes direction 50-60 times per second

• It is generated by power stations and distributed through power lines

• AC current is measured in units of hertz (Hz)

Ampere is the unit of electric current in the International System of Units (SI).

• Ampere is named after the French physicist Andre-Marie Ampere.

• It is defined as the amount of electric charge that flows through a conductor in one second when there is a constant potential difference of one volt across the conductor.

• It is represented by the symbol 'A'.

• Ampere is used to measure the flow of electric current in a circuit.

• It is also used to rate the capacity of electrical devices suc...read more