Diode

Diode is component that work to allow electricity that flows to forward direction and block backward or opposite types of diode are  
    
Backward diode
      It is normally used specialized application only like very high speed switching
   
Baritt diode

This is a time diode and mostly used in microwave application .

Gunn diode

This is mainly used to generate microwave rf signals making it is less expensive to produce signals .this diode not have a pn junction

Laser diode
 
      It is not a normal diode and produce coherent light . this diode are normally used in DVD and CD driver and used as laser light pointer. this diode uses milliwatts to conserve power. But the life of diode is limited

Light emitting diode

         This diode produce visible light and  cheaper price. It is normally used in DVD player cl,computer switch,TV  and light bulb. Light emitting diode are normally known as LED. The new type of LED is OLED is organic light emitting diode.

Photo diode
    This diode is normally used to detecting light. It is normally used to counting and light breaking circuit

Schoottky diode
It is used in rf application and clamming diode

 Step recovery diode
             This diode is used generating radio frequency (Normally calls rf )and pulses.this diode cutt of or turn off in seconds

Zener diode
   It is normally used to produce stable electricity means the electricity is not change

Inductor

Inductor
                Inductor number of characterises in many respects to those of the capacitor.inductor can boost the electricity in the magnetic field.unit of inductance is henry.mostly used as analog circuit and Signal processing
     Type of inductor are
              1.air core inductor
                       This type of inductor do not use magnetic core made by ferromagnetic material.this use other type of material like plastic,ceramic or nonmagnetic forms. inside the inductor do not touch free in air.this are often used high frequency.but this does not support widding in microphony
              2.radio frequency inductor
                    This normally using radio transmission.the wire is higher and high correct but low resistance
             3.ferromagnetic or ironcore
                       This type of inductor use ferromagnetic made of iron or ferrit to increase inductance but energy loses
               4.laminated core inductor
                         Low frequency made with this .this look like a transformer.steel plate or iron plate used to made the inductor and laminate to prevent from eddy current
                 5.toroidal core inductor
                          This inductor use same material magnetic material .looks like a circle or round ring.the one end of side apply electricity and gets the output in other side these are laminated
               6.choke
                  Choke are used block high power ac and allow low power ac.looks like a capacitor in two side in and out or donut
               7.variable inductor
                     This inductor normally used in radios to tune the station less than 100mhz and use non magnetic inductor to more than 100mhz

Transistor

                      Transistor is a component that works as a amplifiy signal and automatic switch.transistor amplifiy the signal connected to the input pin and gets output signal is greater than the input signal.transistor has three pins 1.base 2.emitter 3.collector

resistor

What is the use of resistor?


                          Resistor is passive component that works to reduce the voltage.eg 9v battery connected to one terminal of resistor and the other terminal get 7.5v.
                                     
                                          Note:when the resistors ohm value change and output voltage
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