A positive charge might be placed at one of three spots in a region where there is a uniform electric field How does the electric potential energy U elec on the charge ID: 566132
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Slide1
Electric Energies and PotentialsSlide2
A
positive charge might be placed at one of three spots in a region where there is a uniform electric field. How does the electric potential energy, Uelec, on the charge at positions 1, 2, and 3 compare?
U is greatest at 1U is greatest at 2U is greatest at 3U is 0 at all 3 spotsU is = at all 3 spots but not = 0.
NEXUS/Physics Clicker QuestionsSlide3
When
a positive test charge is released from rest near a (fixed) positive source charge, what happens to the electric potential of the positive test charge?
It will increase because the charge will move in the direction of the electric field.It will decrease because the charge will move in the direction opposite to the electric field.It will decrease because the charge will move
in the direction of the electric field.It will
remain constant
because the electric field
is uniform.
It will remain constant because the charge remains at rest.
NEXUS/Physics Clicker QuestionsSlide4
When
a negative test charge is released from rest near a (fixed) positive source charge, what happens to the electric potential of the positive test charge?
It will increase because the charge will move in the direction of the electric field.It will decrease because the charge will move in the direction opposite to the electric field.It will decrease because the charge will move
in the direction of the electric field.It will
remain constant
because the electric field
is uniform.
It will remain constant because the charge remains at rest.
NEXUS/Physics Clicker QuestionsSlide5
Two test charges are
brought separately into the vicinity of a charge +Q. First, test charge +q is brought to point A
a distance r from +Q. Next, +q is removed and a test charge +2q is brought to point B a distance 2r from +Q.
Compared with the electrostatic potential of the charge
at
A,
that
of the charge at B is 1. greater
2
.
smaller
3
.
the same
4. you can’t tell from the information given
NEXUS/Physics Clicker QuestionsSlide6
Two test charges are
brought separately into the vicinity of a charge +Q. First, test charge +q is brought to point A
a distance r from +Q. Next, +q is removed and a test charge +2q is brought to point B a distance 2r from +Q.
Compared with the electrostatic potential energy of the charge
at A,
that
of
the charge at B is 1. greater
2. smaller
3
.
the same
4. you
can
’t tell from the information given
NEXUS/Physics Clicker QuestionsSlide7
A
positive charge might be placed at one of three spots in a region where there is a uniform electric field. How do the electric potential, V,
on the charge at positions 1, 2, and 3 compare? V is greatest at 1V is greatest at 2V is greatest at 3V
is 0 at all 3 spotsV is = at all 3 spots but not = 0.
NEXUS/Physics Clicker QuestionsSlide8
A
mass might be placed at one of three spots in a region where there is a uniform gravitational field. How do the gravitational potentials, V = gh
, on the mass at positions 1, 2, and 3 compare? V is greatest at 1V is greatest at 2V is greatest at 3
V is 0 at all 3 spotsV is = at all 3 spots but not = 0.
NEXUS/Physics Clicker QuestionsSlide9
Topo
map = grav PE graph (2D)At which point is the force downhill the strongest?ABC
NEXUS/Physics Clicker QuestionsSlide10
Topo
map = grav PE graph (2D)At which point is the force downhill pointing to the east? (North is up)ABCNone
NEXUS/Physics Clicker QuestionsSlide11
Topo
map = grav PE graph (2D)At which point is the force downhill pointing to the north? (North is up)ABCNone
NEXUS/Physics Clicker QuestionsSlide12
Model of PE
for 2 line chargesWhere would a test charge feel the strongest electric force?ABCA and B
NEXUS/Physics Clicker QuestionsSlide13
Model of PE
for 2 line chargesWhere would a test charge feel the strongest electric force?ABCA and BIt would feel no force at any of the three
pointsNEXUS/Physics Clicker QuestionsSlide14
Map
of electric PE for 3 charges (water molecule) (3D)Where would a test charge feel the strongest electric force?ABCDEMore than one
NEXUS/Physics Clicker Questions