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electromagnet

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electromagnet


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Magnet  \Mag"net\,  n.  [OE.  magnete,  OF  magnete,  L.  magnes, 
  -etis,  Gr  ?  ?  a  magnet,  metal  that  looked  like  silver, 
  prop.,  Magnesian  stone,  fr  Gr  ?,  a  country  in  Thessaly.  Cf 
  {Magnesia},  {Manganese}.] 
  1.  The  loadstone;  a  species  of  iron  ore  (the  ferrosoferric  or 
  magnetic  ore,  {Fe3O4})  which  has  the  property  of 
  attracting  iron  and  some  of  its  ores,  and  when  freely 
  suspended,  of  pointing  to  the  poles;  --  called  also 
  {natural  magnet}. 
 
  Dinocrates  began  to  make  the  arched  roof  of  the 
  temple  of  Arsino["e]  all  of  magnet,  or  this 
  loadstone.  --Holland. 
 
  Two  magnets,  heaven  and  earth,  allure  to  bliss,  The 
  larger  loadstone  that  the  nearer  this  --Dryden. 
 
  2.  (Physics)  A  bar  or  mass  of  steel  or  iron  to  which  the 
  peculiar  properties  of  the  loadstone  have  been  imparted; 
  --  called  in  distinction  from  the  loadstone,  an 
  {artificial  magnet}. 
 
  Note:  An  artificial  magnet,  produced  by  the  action  of  a 
  voltaic  or  electrical  battery,  is  called  an 
  {electro-magnet}. 
 
  {Field  magnet}  (Physics  &  Elec.),  a  magnet  used  for  producing 
  and  maintaining  a  magnetic  field;  --  used  especially  of 
  the  stationary  or  exciting  magnet  of  a  dynamo  or 
  electromotor  in  distinction  from  that  of  the  moving 
  portion  or  armature. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Electro-magnet  \E*lec`tro-mag"net\,  n. 
  A  mass,  usually  of  soft  iron,  but  sometimes  of  some  other 
  magnetic  metal,  as  nickel  or  cobalt,  rendered  temporarily 
  magnetic  by  being  placed  within  a  coil  of  wire  through  which 
  a  current  of  electricity  is  passing.  The  metal  is  generally 
  in  the  form  of  a  bar,  either  straight,  or  bent  into  the  shape 
  of  a  horseshoe. 
 
  From  WordNet  r  1.6  [wn]: 
 
  electromagnet 
  n  :  a  temporary  magnet  made  by  coiling  wire  around  an  iron  core; 
  when  current  flows  in  the  coil  the  iron  becomes  a  magnet 




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