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Academy of Career Training Physics Electric Fields Worksheet
User Generated
WT23478
Science
Academy of Career Training
Description
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Here is a summary of all the possible scenarios. - 8 of them.
Q is large relative to q so Q's electric field affects q.
Assume Q is stationary and q is free to move.
A is initial separation and B is the final separation. Therefore, all the differences are final – initial.
1 1
Potential Energy Difference = Eg - En =kQ9
TE
TA
Q
q
Work
Does this
make sense?
Positive
Positive
Direction Potential Energy Difference
of
EB - EA=kQq((1/rB) - (1/1A))
movement
TA > B Positive
(q moving (q charge is repelled so
towards energy required to move it
towards repulsive Q)
Positive work Yes, you or
goes into
some external
moving two force have to
positive put in work to
charges squeeze
together and together two
increasing positive
the potential charges
energy
because they
naturally repel
each other
Positive work Yes, these two
is done by charges
the field and naturally repel
goes into an each other, so
increase in a accelerates
kinetic energy away from Q
of q.
due to the
repulsive
force/field.
Positive
Positive
rB > TA Negative
(q moving (charge is repelled and
away from moving away from Q)
Q)
Positive Negative AB
(q moving
towards
Q)
Negative
Positive work
( charge is attracted towards is done by
Q)
the field and
goes into an
increase in
kinetic energy
of a
Positive Negative B > TA Positive
(q moving (q charge is attracted so
away from energy required to move it
Q) away from )
Positive work
goes into
moving a
positive and
negative
charges apart
and
increasing
the potential
energy
Q
U
Does this
make sense?
Negative Positive
Direction Potential Energy Difference Work
of
movement EB-EA=kQq[(1/rB) - (1/rА))
TA > B Negative
Positive work
(q moving (a charge is attracted towards is done by
towards Q)
the field and
Q)
goes into an
increase in
kinetic energy
of q.
Negative Positive
Positive work
B > TA
(q moving
away from
Q)
Positive
(a charge is attracted so
energy is required to move it
away from Q)
goes into
Negative Negative r>rB
(q moving
towards
Q)
Positive
( charge is repelled so
energy is required to move it
towards Q)
moving a
positive and a
negative
charge apart
and
increasing
the potential
energy
Positive work
goes into
moving two
negative
charges
together and
increasing
the potential
energy
Positive work
is done by
the field and
goes into an
increase in
kinetic energy
Negative Negative B > TA Negative
(q moving (q charge is repelled and
away from moving away from Q)
of q.
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