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posted by  physics12 on 7/15/2008 8:39:19 PM  |  status: Live  

17...physics

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A square coil enclosing an area with sides 2 cm long is wrapped with 2500 turns of wire.  A uniform magnetic field perpendicular to its place is turned on and increases to .25 T during an interval of 1 sec.  What average voltage is induced in the coil? 
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posted by hanu on 7/24/2008 7:16:49 AM  |  status: Live
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Response Details:
 
 
            Given  that the length  of the each side of the coil is L = 2cm =(2cm)(1m/100cm)=0.02m
                                   number of turns in the coil is N = 2500
                                   the change in magnitic field is T = 0.25 T
                                   time intervel is  t = 1s
  -------------------------------------------------------------------------------------
 
          from the given data the  area of the coil is  A = 0.0004m
                  
                induced emf of the coil is   ε = NAB / t 
                                                           = 2500 * 0.0004m*0.25T / 1s
                                                           = --------- V
 
                                                        
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