investigatory project on full wave rectifier. how to do?

Explain Mod-3 Counter with circuit diagram and truth table.

plz define barrier potential.

To set up a common base transistor circuit and to study its input and output characteristic and tocalculate its current gain? answer soon its urgent.

how transistor works as an oscillator? explain clearly please.

working of an LC oscillator

explain transistor as an amplifier and a switch with derivation?

why photodiodes are used in reverse biased condition

how does zener diode act as voltage regulator

Explain working of photodiode and zener diode?

 I want to make my project file on logic gates for final exams please tell me how to make & what is its procedure please tell urgently

 Q) Explain the formation of depletion layer and potential barrier in a p-n junction ?

Explain how a p-type & n-type semiconductors are formed ????

what is the difference between lcd and led tv technology????????

 wat is static and dynamic resistance ?