Unformatted text preview: unstable orientation. (d) The electric field of the dipole is directed from the positive charge and toward the negative charge. Thus, in Figure 17.45a the electric field of the dipole is to the left, opposite to the direction of the external field. Reflect: For any orientation of the dipole the net force on the dipole is zero. But only for and is the net torque zero. u 5 180° u 5 0° u 5 180° 180°. u u 5 180° 180° u u 5 0° u u (a) F 1 F 1 F 2 F 2 (b) (c) (d) 2 q 1 q 1 q F 1 F 2 F 1 F 2 1 q 1 q 2 q 2 q 2 q E E E E u 5 180°, u 5 0° F 2 , F 1 F 2 5 qE , 2 q F 1 5 qE , 1 q F S 5 q E S . E S 2 2.00 m C E 5 1.04 3 10 7 N / C, E x 5 E 1 x 1 E 2 x 1 E 3 x 5 E 2 1 2 E 1 cos 53.1° 5 1.04 3 10 7 N / C E y 5 E 1 y 1 E 2 y 1 E 3 y 5 E 2 5 1 8.99 3 10 9 N # m 2 / C 2 2 2.00 3 10 2 6 C 1 0.0600 m 2 2 5 4.99 3 10 6 N / C E 1 5 E 3 5 1 8.99 3 10 9 N # m 2 / C 2 2 5.00 3 10 2 6 C 1 0.100 m 2 2 5 4.49 3 10 6 N / C Electric Charge and Electric Field 1715...
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 Spring '07
 Shoberg
 Charge, Force, Electric charge, Fundamental physics concepts

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