Question

Transistors are made of

• A. insulators
• B. conductors
• C. doped semicondcutors
• D. none of the above

Answer 1

The correct option is C doped semicondcutors

Transistors are made by stacking of a doped semiconductor to a p-n junction diode either from p-side or n-side, in order to make a sequence either $p-n-p$ or $n-p-n$.