PHYSICS (7.B) 1998-05-09
 Summary and discussion of the measurements:
  1. Discussion of the E-Field-Measurements
  2. Discussion of the B-Field-Measurements
  3. Problems, which occured
Team: Primetzhofer Florian

Ramelow Christoph

Schmid Jurgen

Schwarz Michael
The measurements are taken from a distance of 20-30 cm; each apparatus was turned so long until the maximum value was reached; as far it was possible measurements were taken without bodycontact to the apparatus.

1.) Discussion of the E-Field-Measurements

  • Hair-dryer-bonnet 
name normal value V/m measured value  possible second value
Florian 80  80  
Christoph 80 80  
Jurgen 80 70  
Michael 80 80  
Why?: hair-dryer-bonnet (J?rgen) made 1995, the others are elder models
  • Iron 
Name normal value V/m measured value  possible second value
Florian 120  100  
Christoph 120 100  
Jurgen 120 110  
Michael 120 120 140
Why?: measured values are almost normal values; second iron (Michael) is a steam-iron. Presumption: biger potential difference existing!
  • Toaster 
name normal value V/m measured value  possible second value
Florian 80 90  
Christoph 80 80 tttttttttttt
Jurgen 80 80  
Michael 80 90  
Why?: everything is normal

  • Vacuum cleaner 
Name normal value V/m measured value  possible second value
Florian 30 40   
Christoph 30 10  
J?rgen 30 30  
Michael 30 80  
Why?: Christopher‘s was a handy-vacuum-cleaner and Michael‘s a professional.

Refrigerator
 
 
 
 
 
Name normal value V/m measured value  possible second value
Florian 120  140  
Christoph 120 140  
Jurgen 120 140  
Michael 120 140 90
Why?: measured value is high because of very big refrigerators (height 150 cm); second value is of a smaller one with smaller potential difference;
 
 

  • Colour-TV  
Name normal value V/m Measured value  possible second value
Florian 60 60  
Christoph 60 70  
Jurgen 60 70  
Michael 60 80  
Why?: Michael‘s colour-TV is a model 1980

remarkable: big colour-TV ? 80cm has a smaller field than the little one with ? 35


 
 
 
  • Hi-Fi-Stereo-System 
Name normal value V/m measured value  Possible second value
Florian 180 180  
Christoph 180 180  
Jurgen 180 170  
Michael 180 ---  
Why?: normal values
 
 


 
 
 
  • Incandescent lamp 
Name normal value V/m measured value  possible second value
Florian 4 2  
Christoph 4 2  
Jurgen 4 3  
Michael 4 3 7
Why?: 7 V/m = energy-saving-lamp (hallogen possible)

ATTENTION!: Measuring with the apparatus in the hand!

  • Walkman
Name normal value V/m measured value  possible second value
Florian ? 3  
Christoph ? 3  
Jurgen ? 3  
Michael ? 3  
Why?: ---

ATTENTION!:The distance wasn‘t 30 cm, but 10 cm in order to get reasonable values.

  • Monitor
Name normal value V/m measured value  possible second value
Florian ? 15“ 10  
Christoph ? 15“ 7  
Jurgen ? 15“ 7  
Michael ? 17“ 6 14“ 40
Why?: remarkable: 14“ – monitor is a very old one, so almost 7 time the value of the new 17“ - monitor
  • Clock-radio
Name normal value V/m measured value  possible second value
Florian ? 30  
Christoph ? 30  
J?rgen ? 20  
Michael ? 30  
Why?: ---
 
 
 
 


 
 
  • Sleeping-place
Name normal value V/m measured value  possible second value
Florian 4 - 30 20  
Christoph 4 - 30 30  
J?rgen 4 - 30 20  
Michael 4 - 30 30  
Why?: relativly high values which are just in the allowed area

  • Working-place
Name normal value V/m measured value  possible second value
Florian 100 40  
Christoph 100 60  
J?rgen 100 40  
Michael 100 4  
Why?: the low value at Michael: no disturbance-sources such as radio or desklamp near of the working-place. 2.) Discussion of the B-Field-Measurements
 
 
  • Hair-dryer-bonnet
Name normal value ìÔ measured value  possible second value
Florian 500-1200 900  
Christoph 500-1200 900  
Jurgen 500-1200 800  
Michael 500-1200 900  
Why?: normal values
 
 

  • Cooking stove
Name normal value ìÔ measured value  possible second value
Florian 200-500 300  
Christoph 200-500 500  
Jurgen 200-500 400  
Michael 200-500 300  
Why?: normal values
 
 

  • Colour-TV
Name normal value ìÔ measured value  possible second value
Florian 50-200 100  
Christoph 50-200 150  
Jurgen 50-200 140  
Michael 50-200 200  
Why?: values rise and sink as at the E-fields


 
 
 
  • Toaster
Name normal value ìÔ measured value  possible second value
Florian 5-50 30  
Christoph 5-50 30  
J?rgen 5-50 30  
Michael 5-50 40  
Why?: normal values

  • Vacuum cleaner
Name normal value ìÔ measured value  possible second value
Florian 5-50 20  
Christoph 5-50 3  
Jurgen 5-50 30  
Michael 5-50 60  
Why?: Also here has the handy vacuum cleaner an extremly small magnetic feld!
 
 

  • Clock-radio
Name normal value ìÔ measured value  possible second value
Florian ? apparatus defective  
Christoph ? apparatus defective  
Jurgen ? 10  
Michael ? 70  
Why?: Enormly big difference because of age of the apparatus. An elder apparatus (1987) has a worse transformator ? biger magnetic field ATTENTION!: Distanve not 30 cm, but 15 cm in order to get reasonables values.
  • Sleeping-place
Name normal value ìÔ measured value  possible second value
Florian 10 – 30 10  
Christoph 10 – 30 40  
Jurgen 10 – 30 30  
Michael 10 - 30 30  
Why?: We can’t find a reason for the high values at Christoph!


 
  • Working-place
Name normal value ìÔ measured value  possible second value
Florian 100 50  
Christoph 100 70  
Jurgen 100 80  
Michael 100 30  
Why?: normal values
 
 

3.) Problems, which occured:

We had very big problems to measure with the measuring instrument without having contact with the body, as it is prescricbed!!! ? different values, probably the maximum couldn‘t be measured many times!

Another problem: The measuring instrument itself couldn‘t show reliable values with low battery!!!

Sometimes the 30 cm distance weren‘t possible, so we measured with 20 – 25 cm in order to get values which are near the nominal value
 
 
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