Question

Transistor are made of
(A) Insulators
(B) Conductors
(C) doped semiconductors
(D) none of the above

Answer 1

Hint The above problem is based on the concept of the transistor. The transistors are the electronic devices made by joining the different kinds of semiconductors. The transistor is a three terminal device. The three terminals of the transistor are base, emitter and collector. The base is lightly doped, the emitter is highly doped and the collector is moderately doped.

Complete step by step answer
The metals are divided into three types. First is Insulator, second is Conductor and third is the semiconductor.
The insulators are the type in which the electrons cannot conduct current because the electrons in the insulators are tightly bonded. These require a huge amount of the energy to make the flow of electrons possible. The transistors are not made of the insulator, so the option (a) is incorrect.
The conductors can easily conduct the current because the electron in the conductors remains in Free State at room temperature. The conductors require a very small amount of the energy for the flow of electrons. The insulators are not made of conductors, so the option (b) is incorrect.
The transistors are made by sandwiching one type of semiconductor by another type of the semiconductors. The semiconductor used to make are doped for transistor manufacturing. The transistors are made of the doped semiconductor, so the option (c) is the correct answer.

Note The two types of semiconductor are P type semiconductor and N type semiconductor. The majority carriers in the P type semiconductor are holes and the majority carriers for N type semiconductor are electrons.