Paperclip motor

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Instructions to build a simple electric motor of the equipment commonly available in every household.
This experiment demonstrates the principle of a simplified design of the electric motor.

Educational phase: motiovation, application

 

Required aids+

  • ferrite or neodymium magnet
  • two paper clips
  • insulated enameled copper wire
  • alkohol marker
  • battery type AA

 

Experiment instructions+

E095_S001 Rewind from 10 to 15 coils of the copper wire, the ends of wire form into a longitudinal axes. Then with alcohol marker izolate the end (the end of each in the opposite site).
E095_S002 Paperclip to attach the end of the battery poles and push forefinger and thumb. Then insert the coil between the seconds end of paperclips.
E095_S003 Get motor close to magnet.
E095_S004 Motor starts to rotate.
 

Explanation+

Passing a current through the coil creates a magnetic field around the coil, which consists with a magnetic field of magnet. Action of this resultant force is half-rotation of the coil. Insulated ends of the coil axes provide closing and opening the circuit and the coil is in constant motion.
 

Experiment video+

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You have too outdated browser to play video clips
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Note+

Coil resistance is very small, you should not let the motor in continuous operation, there would be an early discharge of the battery.
 
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This experiment has been added 17.11.2011 by Jan Krejčí and since then have 18121 visits.
 
3.6.2014 21:44 © Krejčí Jan
 
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