*  The  purpose  of  the  record  of  an  experiment  is  to  explain  clearly  and  concisely  what  you  are  trying  to  do,  what  you  actually  did,  what  you  actually  observed,  and  what  you  concluded  from  your  observa;ons.    

PHYS3330:  Lab  Report  

*You  lab  report  should  be  understood  by  someone  who  is  not  taking  this  courses.  

*Explain  variables  you  introduce.  Use  the  consistent  symbols  and  variables  throughout  your  lab  reports  including  figures,  tables  and  plots.  

*Your  lab  report  must    contain  the  followings:  -­‐  Title  -­‐  Objec1ve  -­‐  Idea/Apparatus/Theory  -­‐  Procedure  -­‐  Result  and  Data  analysis  -­‐  Conclusion  

Lab  Reports:  Details  of  Contents  and  Examples  

Title:  Title  of  the  lab      

Objec1ve/Goal:  One  or  two  Sentences  of    Basic  intent  of  the  experiment    

name, Partner name, section etc

Ideas/Theory/Apparatus:  Describe  the  main  ideas  or  equa;ons  that  will  be  used  in  the  lab.  You  can  include  the  circuit  diagram  or  schema;cs  here.    

Ideas/Apparatus:  Describe  the  main  ideas  or    key  equa;ons  that  will  be  used  in  the  lab.  You  can  include  the  circuit  diagram  or  schema;cs  here.  

Procedure:  Summary  of  process  you  followed    while  carrying  out  the  experiment.  no  more  than  ½-­‐1  pages.    

Voltage  divider  

Wheatstone  Bridge  

Copper  wire  resis;vity  measurement  

Result  and  Data  Analysis:  -­‐The  complete  data  set    :  Uses  of  table  is  strongly  recommended  -­‐  Calcula;on  of  results:    Detailed  numerical  sample  of  each  type  with  unit  and  conversion.  -­‐  Relevant  Plots  (including  axis  label,  unit,  ;tle)  -­‐  If  you  have  not  reached  the  desirable  results,  explain  how  you  troubleshoot  and  the  result.  

Voltage  divider  

Wheatstone  Bridge  

When Rx changed by 5% by adding 50 Ω, ΔRx = 50Ω, ΔVmeausred = 0.184V ΔV_calc = 0.190 V.

There was 3% discrepancy.

when the bridged is “balanced” (ΔV =0)

Result  and  Data  Analysis  

****Add  PLOTS  in  this  sec;on  if  it  is  needed  -­‐Check  axes  labels,  units  and  ;tle.     Fig.4  Bode  plot  for  high  Pass  filter    

Copper  resis;vity  measurement  

Thus resistivity from DMM (ρDMM) and 4-terminal measurements (ρ4tc) is ρDMM = 1.5 μΩ cm and ρ4tc = 1.72 μΩ cm Each values has corresponding error coming from the reading of voltmeter. They are ...... These values is compared to the known value from the pre-lab 1.69μΩ cm has ***% of error.

Result  and  Data  Analysis  

Conclusion:  -­‐Summarize  your  results  and  compare  them  to  accepted  or  calculated  values.  (if  you  did  this  in  analysis  sec;on,  say  again  in  brief  form!)  -­‐If  you  have  suspicions    and/or  large  discrepancy  in  your  result,  discuss  here  with  reasonable  quan;ta;ve    es;mates  -­‐You  lose  points  by  simply  unsubstan;ated  or  incorrect  guess  -­‐S;ck  to  scien;fic  conclusions!  Not  opinions,  no  personal  comments!  

(Bad  example)  ...  This  lab  was  fun  and  I  learned  a  lot.  It  is  really  sad  that  we  did  not  get  the  right  result  in  the  end.    

kΩ  kΩ