Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Part of Made in India,
Design Innovation
Workshop,2015
A	
  Fresh	
  New	
  Experience	
  in	
  
Project-­‐Making	
  &	
  ...
PHYSICSINVESTIGATORY
PROJECTON
WHEATSTONEBRIDGE
Do	
  you	
  know	
  how	
  a	
  low	
  temperature	
  alarm	
  
works?	
  A	
  thermistor	
  is	
  used	
  in	
  place	
 ...
Have	
  a	
  look	
  at	
  our	
  Project	
  Kit!
CoolJunk	
   is	
   India's	
   fastest	
  growing	
  DIY	
  (do-­‐it-­‐...
Upcoming SlideShare
Loading in …5
×

Physics Investigatory Project on Wheatstone Bridge.

Are you a class 12 student looking for high quality Physics Investigatory Projects for your CBSE/ICSE assessments?
Do you want to achieve high grades in your physics investigatory project, gain technical skills in electronics and develop a genuine interest in physics and engineering?
Now you can with CoolJunk’s new and amazingly easy to use, innovative DIY (do-it-yourself) kit for electronics and electrical projects that are fully compliant with the CBSE/ICSE physics project curriculum requirements.
Visit our website: http://www.cooljunk.in/physics-project-kits
Using CoolJunk KIT-1 students can set up their personal lab at home, learn hands on electronics and can perform fun-to-do experiments sitting at home.
For more information, visit our website: http://www.cooljunk.in

  • Login to see the comments

Physics Investigatory Project on Wheatstone Bridge.

  1. 1. Part of Made in India, Design Innovation Workshop,2015 A  Fresh  New  Experience  in   Project-­‐Making  &  Learning!
  2. 2. PHYSICSINVESTIGATORY PROJECTON WHEATSTONEBRIDGE
  3. 3. Do  you  know  how  a  low  temperature  alarm   works?  A  thermistor  is  used  in  place  of  one  of  the   bridge  resistors.  The  resistance  of  the  thermistor  is   inversely  propor=onal  to  the  temperature  it  is   exposed  to.  This  means,  if  the  temperature   increases,  the  resistance  of  the  thermistor   decreases  and  vice  versa. At  50  degrees,  the  resistance  of  the  thermistor  and   the  predetermined  resistances  of  the  three  fixed   resistors  are  at  values  that  make  the  bridge   balanced.  Suppose  the  temperature  drops  from  50   to  40  degrees,  the  poten=al  at  one  end  of  the   bridge  becomes  more  posi=ve  than  the  other   leading  to  a  voltage  difference  which  causes  an   alarm  to  ac=vate.   A  Wheatstone  bridge  is  a  simple  four  arm   arrangement  of  4  resistors  and  is  used  to  calculate   the  value  of  an  unknown  resistance.  Among  the  4   resistors  two  are  of  known  value  (P  and  Q),  one  is   a  variable  resistor  (G)  and  the  other  resistor  (R)  is   unknown.  The  variable  resistor  (in  this  case  a   preset  is  used)  is  adjusted  such  that  the  current   through  the  mul=meter  (A)  is  zero  and   consequently,  the  poten=al  difference  across  the   terminals  becomes  zero.  In  this  stage  the  bridge  is   said  to  be  balanced  such  that  the  ra=o  of  two   known  resistances  is  equal  to  the  ra=o  of  the   unknown  resistance  and  the  variable  resistance   i.e.,  P/Q  =  R/S.  The  theore=cal  and  prac=cal  values   of  resistances  were  compared  and  the  rela=ve   error  was  calculated.
  4. 4. Have  a  look  at  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.   For  more  projects  visit  our  website:  CoolJunk   Tools  and  Components  in   one  box. Step  by  step  visual   instrucUons Detailed  experiment   theory CoolJunkCoolJunkCoolJunk Follow  us  on: CoolJunk

×