No. A diode can not be used as a transistor. A diode allows electricity to flow in one direction like a one way street. A transistor works the same way as putting a stop light in the one way street. It lets electricity flow at certain times and keeps electricity from flowing at certain times.
Of course a diode only works when electricity is there to flow just like a one way street only works when there are cars there to ride through it.
transister is the electronic divice used for correct current flow
No, the doping profile is entirely wrong. Also some transistors have very low reverse breakdown voltage on the BE junction and will burn out!
Resistor, transister, diode, capacitor etc
In unijunction transister there be a only one P-N Junction like diode, and current conduction takes place by either through holes or electrons.
yes, diode can be used as rectifier diode to convert ac to dc
A diode is used primarily as a Rectifier
yes ofcourse diode can be used as rectifier but it's an uncontrolled rectification.
varactor diode is a correct answer
zener diode
It's a high voltage diode, typically used in microwave ovens.
Bipolar transister consist of emitter base & collecter
The difference between the pn-junction diode and the zener diode is that the pn-junction diode is used for rectification while the zener diode is used for rectification and stabilization. Also, the zener diode can function in the breakdown region while the pn-juntion diode can not function in that regime.