21.53 Point charges q1 = -4.5 nC and q2 = +4.5 nC are separated 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 connecting the charges. What is the magni- tude of this field if the torque exerted on the dipole has magnitude 7.2 X 109 Nm?

21.53 Point charges q1 = -4.5 nC and q2 = +4.5 nC are separated 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 connecting the charges. What is the magni- tude of this field if the torque exerted on the dipole has magnitude 7.2 X 109 Nm?

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Chapter1: Units, Trigonometry. And Vectors

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Concept explainers

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.

Question

Section 21.7 Electric Dipoles
+4.5 nC are
21.53 Point charges q₁ = -4.5 nC and 92 =
separated 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 connecting the charges. What is the magni-
tude of this field if the torque exerted on the dipole has magnitude
7.2 X 109 N.m?

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