Purbanchal Enterprise Interview Questions, Process, and Tips

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

• AC stands for Alternating Current

• It is commonly used in household appliances and power distribution systems

• The voltage and frequency of AC current can vary depending on the application

• Examples of AC current include the power from a wall outlet and the electricity generated by a wind turbine

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

• DC stands for Direct Current.

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

• DC current is used in electronic devices such as computers, televisions, and radios.

• It is also used in electric vehicles and trains.

• DC current is measured in amperes (A).

A DC motor is an electrical machine that converts direct current electrical energy into mechanical energy.

• DC motors are commonly used in various applications such as electric vehicles, robotics, and industrial machinery.

• They consist of a stator, rotor, commutator, and brushes.

• The direction of rotation can be changed by reversing the polarity of the input voltage.

• DC motors are classified into two types: brushed and brus...read more

AC motor power refers to the amount of electrical energy that can be converted into mechanical energy by an AC motor.

• AC motor power is measured in watts (W)

• It is calculated by multiplying the voltage, current, and power factor of the motor

• The power factor is a measure of how efficiently the motor converts electrical energy into mechanical energy

• AC motor power can be increased by increasing the voltage or current suppli...read more

RCCB stands for Residual Current Circuit Breaker. It is a safety device that quickly disconnects the power supply when it detects a leakage current.

• RCCB is also known as a residual current device (RCD).

• It is used to protect against electric shock and fire caused by faulty wiring or appliances.

• RCCB works by comparing the current flowing in the live and neutral wires. If there is a difference, it means that some current ...read more

MCB stands for Miniature Circuit Breaker. It is an electrical switch that automatically shuts off the electrical circuit during an overload or short circuit.

• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

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

• MCBs are available in different current ratings and can be easily reset ...read more