Figure 1 shows two point charges with charge
at distances from a midpoint . What is the total electric field at
point ? (
(a) (b) (c) 0 (d) (e) None of
Figure 2 shows the electric field lines of two
point charges of magnitude and opposite sign (dipole). With the
same convention, what is the correct configuration of electric field lines
of an isolated point charge ?
A cube of size
contains two point
charges inside, with equal magnitude but with opposite sign ( and
). What is the net electric field flux through the surface of the
(a) (b) 0 (c) (d)
(e) Not enough information
Which one of the following statements about conductors in
electrostatic equilibrium is FALSE?
The electric field is zero everywhere inside the conductor.
If an isolated conductor carries a charge, the charge
resides on its surface.
The electric field just outside a charged conductor is
perpendicular to the surface of the conductor and has a magnitude
, where is the surface charge density at
On an irregularly shaped conductor, the surface charge
density is greatest at locations where the radius of curvature of the
surface is smallest.