Name _____ KEY ____________________________________ Date _________ Period ______
Electric Fields
1.
A positive charge in an electric field feels a force in the direction of the field.
A negative charge feels a force in a direction opposite the field.
What determines the strength of a charge’s electric field at a certain point?
2.

3.
The size of the charge and the distance to the charge.
The electric field in a region is shown below. At which marked point is the electric field
the strongest? At which point is it the weakest? Explain.

4.
Fields are stronger when they are closest to the
source. Thus, the field is strongest at A and
weakest at D.
Why are many electrical wires enclosed in a metal covering?

5.
Conductors that are not carrying a current have no net field inside. By covering
a wire with a conducting material the wire is shielded to prevent interference.
Draw the electric field lines for the following sets of charges:
a.
b.
The electric field around two positive charges looks most like:
6.
a.
7.
b.
c.
d.
The charge is most like A, because the forces move out from positive charges
Which of the following diagrams is NOT a possible representation of an electric field?
a.
b.
c.
d.
B is not possible because it has the force moving out from a negative charge.