15 & 16
Forces & Energy
of the Electric Field,
a test charge experiences
a force at
a given location, the electric field at
that location is
electric field is the force per charge at a given location.
Video of Electric Field
for the force gives us the force on a given charge:
a certain region of space, a uniform electric field has a magnitude
points in the positive x direction. Find the magnitude and direction
of the force this field exerts on a charge of (a) +2.80 µC
and (b) -9.30 µC.
Field of a Point Charge
of the Electric Field Due to a Point Charge
the electric field produced by a 1.0 µC point charge at a distance
of (a) 0.75 m and (b) 1.5 m.
charges, and ,
have equal magnitudes q and are placed as shown in the figure. The
net electric field at point P is vertically upward. We conclude that
negative; (b) is
positive; or (c) and have
the same sign.
charges, each equal to +2.90 µC, are placed at two corners
of a square 0.500 m on a side, as shown. Find the magnitude and
direction of the net electric field at a third corner of the
square, the point labeled 3 in sketch.
On to Electric Field Lines