Avh Polychem Interview Questions and Answers

A relay is an electrically operated switch that opens or closes circuits electronically.

• Relays are used to control high voltage circuits with low voltage signals.

• They are commonly used in industrial automation, automotive applications, and household appliances.

• Relays can be either electromechanical or solid-state.

• Examples of relays include power relays, time-delay relays, and latching relays.

The current is the flow of electric charge in a circuit.

• Current is measured in amperes (A).

• It is caused by the movement of electrons or other charged particles.

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

• DC flows in one direction, while AC periodically reverses its direction.

• Examples of current include the flow of electricity in a light bulb or the charging of a phone.