70 likes | 176 Views
iron core. B Fe H Fe. B gap H gap. gap region. i. coil windings. B air H air. thickness t. width L. q = - e. area A. electrons are the charge carriers in copper. + + + + + + + + +. dy. + + + + + + + + +. F. - - - - - - - - -.
E N D
iron core BFe HFe Bgap Hgap gap region i coil windings Bair Hair
thickness t width L q = - e area A electrons are the charge carriers in copper
+ + + + + + + + + dy + + + + + + + + + F - - - - - - - - - -q +q
Induced dipole moment – helium atom +2e +2e -e -e -e -e Zero electric field – helium atom symmetric zero dipole moment A B effectively charge +2e at A and -2e at B dipole moment p = 2ed
Er E P r2 r + (d/2)cos r1 r – (d/2)cos r (d/2)cos +q -q
dA +f + + + + + + + + + -b +b - - - - - - - - - -f
-q +q