Please answer only a.
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Please answer only a.
Transcribed Image Text:7. An electric dipole with dipole moment p is
placed in an external, uniform electric field of
strength Eo.
origin and is made by placing two charges of
charge +ą and -q a
with p=qd. The dipole moment is a vector,
and the direction of p will be the unit vector
pointing from the negative charge to the
positive charge. Let 0 be the angle between p
and E.
a) If E points in the x-direction, and the dipole is
in the xy-plane, what are the coordinates for
the positive charge and the negative charge,
in terms of d and 0?
The dipole is centered at the
fixed distance d apart,
b) What force does each charge feel? What is the
net force, Fnet, on the dipole?
c) What is the net torque on the dipole, taking
the torque about the center of the dipole?
(Remember: Tnet=ErxF)
E.
d) Show that your answer is consistent with the
standard formula for the torque on a dipole,
T=pxE. **
dipole in an electric field
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