24. Electric Force & Field; Gauss' Law
Coulomb's Law (Electric Force)
Problem 23d
Textbook Question
Textbook QuestionAn electret is similar to a magnet, but rather than being permanently magnetized, it has a permanent electric dipole moment. Suppose a small electret with electric dipole moment 1.0×10^−7 C m is 25 cm from a small ball charged to +25 nC , with the ball on the axis of the electric dipole. What is the magnitude of the electric force on the ball?
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