Electronic component can be divided into 2 types: Active and Passive components
Resistors and Capacitors etc. are known as passive components because they can only attenuate the electrical voltage and signals and cannot amplify.
Devices like transistors and operational amplifier(op Amps)can amplify or increase the amplitude and energy associated with the signals and so are termed as Active components.
Apart from components and circuits we must also have familiarity with some of the essential electronic measuring instruments like multimeter, regulated power supplies, function generators and oscilloscopes etc.