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Types of Electronic component Active components In the electronic circuit, those components that require an external power source, to  control or modify electrical signals are called Active Components. Active components can Inject power into a circuit and are capable of electrically controlling and amplifying the flow of electrical current.             Examples – Diode, Transistor, SCR ( silicon-controlled rectifiers),  Generator, Alternator, Integrated circuit, Vacuum tube, LED, Photodiode, Op Amp, Seven Segment Display & Battery.   Passive components Passive components influence (প্রভাব) the flow of power , but do not require an external power source to function, is called Passive components. Examples - are resistors, inductors, capacitors, Transformers, Switches, Voltmeters, and Ammeters, LDR, thermistors, and Variable resistors. What is Electronic? Or  What do you understand from the word electronics? ...