Wheatstone Bridge



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 Code Number :   5F20.40  

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

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Condition :   Excellent  
Principle :   Determination of Unknown Resistance  
Area of Study :  Electricity & Magnetism   
Equipment :   Wheatstone Bridge Demo Unit, Lecture Bench Galvanometer.

Procedure :   Plug in the power supply that is mounted on the demo unit. Choose one of the unknown resistances and put it into the circuit. By adjusting the resistor box to the proper values and finding the place on the slide wire where the galvanometer read no deflection the exact resistance of the unknown or approximate resistor may be determined.  
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   References

Thomas B. Greenslade Jr., "Wheatstone's Bridge", TPT, Vol. 43, # 1, Jan. 2005, p. 18.

Thomas B. Greenslade Jr. "The Hydraulic Analogy for Electric Current." TPT, Vol. 41, # 8,  Nov. 2003, p. 464.

Benjamin J. Pernick, "Optimum Setting of a Slide Wire Wheatstone Bridge", TPT, Vol. 29, # 1, Jan. 1991, p. 35.

Buford M. Guy, "Using an Oscilloscope with the Wheatstone Bridge", TPT, Vol. 11, # 1, Jan. 1973, p. 52. 

 

Eg-6:  Freier and Anderson,  A Demonstration Handbook for Physics.

 

Walter C. Michels,  "3.2 The Wheatstone Bridge,"  Electrical Measurements and Their Applications, p. 56 - 64.

Neil A. Downie, "Six-Wire Telegraph",  Ink Sandwiches, Electric Worms and 37 Other Experiments for Saturday Science, p. 264.



Mail Questions and Comments to:  Dale Stille