Point  charges  q1=-4.5 nC  and  q2=+4.5 nC  are  sepa-rated by 3.1 mm, forming an electric dipole. (a) Find the electric dipole moment  (magnitude  and  direction).  (b)  The  charges  are  in  a  uniform  electric field whose direction makes an angle of 36.9° with the line con-necting  the  charges.  What  is  the  magnitude  of  this  field  if  the  torque  exerted on the dipole has magnitude 7.2*10-9 N#m?

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.