Gujarat State Petronet Instrumentation Technician Interview Questions and Answers

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease voltage levels in electrical circuits.

• They consist of primary and secondary coils wound around a core made of ferromagnetic material.

• Step-up transformers increase voltage for long-distance power transmission, while step-down transformers decrease voltage...read more

The unit of resistance is ohm (Ω), named after German physicist Georg Simon Ohm.

• The unit symbol for resistance is Ω

• Resistance is measured using an ohmmeter

• 1 ohm is equal to 1 volt per ampere (V/A)

The unit of current is Ampere (A)

• The unit of current is named after the French physicist Andre-Marie Ampere

• 1 Ampere is defined as the flow of 1 Coulomb of charge per second

• Commonly used prefixes for current include milliampere (mA) and microampere (μA)