Photo diode#!#Solar cell#!#Zener diode

A Zener diode

Special uses of p-n junction diode |Photodiode| Solar cell and LED

Photo diodes are used is

The symbol of a diode is show in the figure (a) the diode is a _________rectifier diode / photo diode / zener diode (b) draw the VI characteristics of above diode (c ) a zener diode with V_(z)=6.0 V is sued for voltage regulation if the unregulated input is 10.0 V what is the value of series resistor R (d) what is the fundamental frequency of the ripple in a full wave rectifier cirucit operating from 50 Hz mains

The correct symbole for Zener diode is