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Physics Investigatory Project on Functioning of Diode and its V-I Characteristics.

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Physics Investigatory Project on Functioning of Diode and its V-I Characteristics.

  1. 1. Part of Made in India, Design Innovation Workshop,2015 A  Fresh  New  Experience  in   Project-­‐Making  &  Learning!
  3. 3. Do  you  know  how  mul,purpose  an  ordinary  p-­‐n   junc,on  diode  is?  It  is  used  for  power  rec,fica,on   (changing  AC  into  DC),  as  an  electrical  switch,  and  surge   protec,on  etc.  You  can  test  out  its  func,oning  in   forward  and  reverse-­‐bias  modes,  measure  its    forward   bias  voltage  and  vary  current  through  it  to  study  V-­‐I   characteris,cs.   This  project  is  divided  into  two  phases.    In  the  first   phase,  you  will  need  a  diode,  an  LED,  a  resistor  and  a   few  connec,ng  wires.  The  black  side  of  the  diode   represents  its  p-­‐side  and  its  silver  stripe  is  the  n-­‐side.   The  connec,ons  were  made  such  that  the  n-­‐side  of  the   diode  was  connected  to  the  posi,ve  terminal  of  the   LED.  AJer  the  comple,on  of  the  circuit,  the  LED  glows.   The  voltage  was  measured  across  the  diode  using  a   mul,meter.  However,  when  the  connec,ons  of  the   diode  were  reversed  i.e.,  when  the  p-­‐side  of  the  diode   is  connected  to  the  posi,ve  terminal  of  the  LED,  the   LED  stopped  glowing.    It  was  also  observed  that  a  diode   needs  a  minimum  forward  bias  voltage  of  0.6-­‐0.7  V  to   allow  the  current  to  pass  through  it. In  the  second  phase,  you  will  need  a  preset,  a  diode,  a   resistor  and  a  few  connec,ng  wires.  A  voltage  divider   circuit  was  made  using  a  preset.  Using  the  voltage   divider,  different  input  voltages  were  given  to  the   circuit.  At  each  input  voltage,  the  voltage  across  the   diode  and  the  current  passing  through  it  were   measured  using  a  mul,meter.  Five  different  voltage   and  current  readings  were  noted  and  a  graph  was   ploRed  between  V  and  I  to  study  V-­‐I  characteris,cs  of   the  diode.
  4. 4. Have  a  look  at  what  we  provide  in  our  Project  Kit! CoolJunk   is   India's   fastest  growing  DIY  (do-­‐it-­‐yourself)   kits   company   focused   on   project-­‐based   learning   in   science,  engineering  and   technology.  Having   20,000   users   in   India,  US,   Singapore,   Middle   East   and   New   Zealand,  the  CoolJunk  kits  are  known  for  quality,  innovaUon  and  high  producUon  value.  CoolJunk  has  been   featured   in   naUonal   and   internaUonal   journals   including   Wallstreet,   Yourstory,   Hindu   Business   Line,   NextBigWhat  and  was  tagged  as  the  coolest  Indian  start-­‐up  in  IAN  Bootcamp-­‐2011.   You  may  also  refer  to  the  video:  Diode For  more  projects  visit  our  website:  CoolJunk   All  tools  and  components   in  one  box. Step  by  step  visual   instrucUons Detailed  experiment   theory CoolJunkCoolJunkCoolJunk Follow  us  on: CoolJunk