Point charges q1 = -4.5 nC and q2 = +4.5 nC are separatedby 3.1 mm, forming an electric dipole. (a) Find the electric dipolemoment (magnitude and direction). (b) The charges are in a uniformelectric field whose direction makes an angle of 36.9 with the line connectingthe charges. What is the magnitude of this field if the torqueexerted 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.