Activities Identify a diode, transistor, I.c. and resistor from mixed collection.
Answers
For the identification of each element their appearance and working is to be considered. Below are the noted characteristics of each of these element which should be used for identification :
1) Diode - A diode is a two terminal device which conducts only in forward biased mode.
2) Transistor: A transistor is a three terminal device having emitter, base and collector. So any three terminal device in the mixture is a transistor.
3) Integrated Circuit (IC) - An integrated circuit is a multi terminal device and looks like a chip. So any multi terminal device in the mixture is an IC.
4) Resistor - A registor is a two terminal device with straight appearance and having rings in it. It conducts whenever a voltage is applied across it. There is no concept of biasing for a resistor.
Since both Diode and resistor are two terminal device so they both needs to be identified either by their looks or by working principal i.e. resistor conducts for all the applied voltage while diode conducts only for forward biased voltage.