Embed Size (px)
DESCRIPTION
Electric Energies and Potentials. 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 at positions 1, 2, and 3 compare?. U is greatest at 1 - PowerPoint PPT Presentation
Citation preview
Clicker Questions for NEXUS/Physics
Electric Energies and Potentials
NEX
US/
Phys
ics C
licke
r Que
stion
s
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?
A. U is greatest at 1B. U is greatest at 2C. U is greatest at 3D. U is 0 at all 3 spotsE. U is = at all 3 spots
but not = 0.
NEX
US/
Phys
ics C
licke
r Que
stion
s
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?
A. It will increase because the charge will move in the direction of the electric field.
B. It will decrease because the charge will move in the direction opposite to the electric field.
C. It will decrease because the charge will move in the direction of the electric field.
D. It will remain constant because the electric field is uniform.
E. It will remain constant because the charge remains at rest.
NEX
US/
Phys
ics C
licke
r Que
stion
s
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?
A. It will increase because the charge will move in the direction of the electric field.
B. It will decrease because the charge will move in the direction opposite to the electric field.
C. It will decrease because the charge will move in the direction of the electric field.
D. It will remain constant because the electric field is uniform.
E. It will remain constant because the charge remains at rest.
NEX
US/
Phys
ics C
licke
r Que
stion
s
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. greater2. smaller3. the same4. you can’t tell from the information given
NEX
US/
Phys
ics C
licke
r Que
stion
s
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. greater2. smaller3. the same4. you can’t tell from the information given
NEX
US/
Phys
ics C
licke
r Que
stion
s
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?
1. V is greatest at 12. V is greatest at 23. V is greatest at 34. V is 0 at all 3 spots5. V is = at all 3 spots
but not = 0.
NEX
US/
Phys
ics C
licke
r Que
stion
s
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?
1. V is greatest at 12. V is greatest at 23. V is greatest at 34. V is 0 at all 3 spots5. V is = at all 3 spots
but not = 0.
NEX
US/
Phys
ics C
licke
r Que
stion
s
Topo map = grav PE graph (2D)
At which point is the force downhill the strongest?
A. AB. BC. C
NEX
US/
Phys
ics C
licke
r Que
stion
s
Topo map = grav PE graph (2D)
At which point is the force downhill pointing to the east? (North is up)
A. AB. BC. CD. None
NEX
US/
Phys
ics C
licke
r Que
stion
s
Topo map = grav PE graph (2D)
At which point is the force downhill pointing to the north? (North is up)
A. AB. BC. CD. None
NEX
US/
Phys
ics C
licke
r Que
stion
s
Model of PE for 2 line charges
Where would a test charge feel the strongest electric force?A. AB. BC. CD. A and B
NEX
US/
Phys
ics C
licke
r Que
stion
s
Model of PE for 2 line charges
Where would a test charge feel the strongest electric force?A. AB. BC. CD. A and BE. It would feel
no force at any of the three points
NEX
US/
Phys
ics C
licke
r Que
stion
s
Map of electric PE for 3 charges (water molecule) (3D)Where would a test charge feel the strongest electric force?A. AB. BC. CD. DE. EF. More than one
![IDpotential of renewable energies [32] (see also Section2.3.3). Third, both countries represent a very broad range of geographical conditions (affecting renewable energy potentials):](https://img.dokumen.tips/doc/110x75/60d3c4b7a82fab3fe714fff7/id-potential-of-renewable-energies-32-see-also-section233-third-both-countries.jpg)
