Electric Dipole in an Electric Field
The water molecule, H2O, has a permanent polarization
resulting from its nonlinear geometry. The center of the positive charge distribution is at the point x.
Electric Dipole in an Electric Field
(a)A linear symmetric molecule has no permanent polarization.
(b)An external electric field induces a polarization in the molecule.
Home work:
An Atomic Description of
Dielectrics
Quick Quiz 12.5
A spherical balloon contains a positively charged object at its center. As the balloon is inflated to a greater volume while the charged object remains at the center, does the electric potential at the surface of the balloon (a)increase,
(b)decrease, or (c)remain the same?
Does the electric flux through the surface of the balloon
(d)increase,
(e)decrease, or
(f)remain the same?
Quick Quiz 12.6
In Figure, take q1 to be a negative source charge and q2 to be the test charge. If q2 is initially positive and is changed
to a charge of the same magnitude but negative, the potential at the position of q2 due to q1
(a)increases
(b)decreases
(c) remains the same.