Homework Answers
We know E = - gradient of V
i.e. it is always perpendicular to V. True.
It is also true ( E= - gradient of V )
False . Electron volt is a unit of energy.
True , It should decrease.
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PART 2: Electric Potential 1. (2) TF Equipotential surfaces are perpendicular to electric field lines. 2....
1) Which of the following statements about electric fields and equipotential surfaces are correct? (check all...
1) Which of the following statements about electric fields and equipotential surfaces are correct? (check all that apply) a)The electric field direction is always from higher potential to lower potential. b)The number of electric field lines per unit area perpendicular to the field lines is proportional to the strength of the electric field in that region c)Equipotential surfaces are surfaces where the potential is constant over this surface. d)Electric field lines begin on positive charges and end on negative charges....
1- For a uniform electric field, how is the electric potential energy similar to the gravitational...
1- For a uniform electric field, how is the electric potential energy similar to the gravitational potential energy in a uniform gravitational? 2-If a positive charge and a negative charge moving the same way in an electric field have the same change in electric potential energy? 3-For a positive charge moving in an electric field, which direction of motion will cause the electric potential energy to increase? Decrease? Stay constant? 4-How would the answers to the previous question be different...
2) Explain why the equipotential surfaces should be always perpendicular to the electric field lines? 3)...
2) Explain why the equipotential surfaces should be always perpendicular to the electric field lines? 3) A uniform electric field is parallel to the y-axis. What direction can a charge be displaced in this field without any external work being done on the charge?
The drawing shows a cross-sectional view of two spherical equipotential surfaces and two electric field lines...
The drawing shows a cross-sectional view of two spherical
equipotential surfaces and two electric field lines that are
perpendicular to these surfaces. When an electron moves from point
A to point B (against the electric field), the
electric force does +3.2 x 10-19 J of work. What are the
electric potential differences (a) VB -
VA, (b) VC -
VB, and (c) VC -
VA?
Electric field lines Equipotential surfaces Cross-sectional view) O (a) o V, (b) 0 V, (c)...
1) Do the electric field lines cross? Can two equipotential 2) Explain why the equipotential surfaces...
1) Do the electric field lines cross? Can two equipotential 2) Explain why the equipotential surfaces should be always 3) A uniform electric field is parallel to the y-axis. What lines ever cross? Explain. perpendicular to the electric field lines? direction can a charge be displaced in this field without any external work being done on the charge?
A uniform electric field is shown below. Draw equipotential surfaces. In which direction does the voltage...
A uniform electric field is
shown below. Draw equipotential surfaces. In which direction does
the voltage decrease? If an electron is placed in the electric
field at rest, draw the direction of the force. The electron moves
from higher potential point to lower potential point or the other
way around? If the potential difference between two locations of
the electron is 5V, what is the change in potential energy of the
electron. What is its speed at the end of...
Possibly useful equations: Electric force: F-kqqz/? Force from E field: F=qE Electric potential: V - kq/r...
Possibly useful equations: Electric force: F-kqqz/? Force from E field: F=qE Electric potential: V - kq/r PE-V Mag Fld near wire: B = d.l/2xr F-qvBsine E=q/4ter? Plate A: 100 cm long 1. The electric field lines running between a plate at 4 V and a plate at 0 V are observed to be as follows: A) Which plate (A or B) is the one at OV? How do you know? Plate B: 40 cm long B) On the above picture,...
The drawing shows a cross-sectional view of two spherical equipotential surfaces and two electric field lines...
The drawing shows a cross-sectional view of two spherical equipotential surfaces and two electric field lines that are perpendicular to these surfaces. When a proton with charge e moves from point B to point A the electric force does a positive work W (measured in joule). What is the electric potential differential V_B - V_A? W e W/e 0 Equal to V_C - V_B -W/e For the same problem above, what is the electric potential difference V_C - V_B? W...
(Figure 1) shows a region of space with an electric field. Vertical lines indicate equipotential surfaces....
(Figure 1) shows a region of space with an electric field.
Vertical lines indicate equipotential surfaces. A particle with
charge q = -4.8 nC is initially at the location of the -20-V
equipotential line. At time t = 0 the particle is released from
rest. Ignore the force exerted by Earth on the particle.
Part A: Estimate the magnitude of force exerted by the electric
field on the particle when it passes the 0-V equipotential
line.
Part B: Estimate the...
The equipotential surfaces in the field map below (shown as dashed lines) have potential differences between...
The equipotential surfaces in
the field map below (shown as dashed lines) have potential
differences between a point at infinity and themselves of 1V, 5V,
and 10V. (a)[4 pt(s) ]Label the surfaces with the correct voltage.
Justify your choices using the properties of electric potential and
its relation to work. (b)[3 pt(s) ]Is the work to move a +q charge
from points A to B positive, negative, or about zero? Justify using
the properties of work and electric potential. (c)[3...
2) Explain why the equipotential surfaces should be always perpendicular to the electric field lines? 3) A uniform electric field is parallel to the y-axis. What direction can a charge be displaced in this field without any external work being done on the charge?
The drawing shows a cross-sectional view of two spherical
equipotential surfaces and two electric field lines that are
perpendicular to these surfaces. When an electron moves from point
A to point B (against the electric field), the
electric force does +3.2 x 10-19 J of work. What are the
electric potential differences (a) VB -
VA, (b) VC -
VB, and (c) VC -
VA?
Electric field lines Equipotential surfaces Cross-sectional view) O (a) o V, (b) 0 V, (c)...
1) Do the electric field lines cross? Can two equipotential 2) Explain why the equipotential surfaces should be always 3) A uniform electric field is parallel to the y-axis. What lines ever cross? Explain. perpendicular to the electric field lines? direction can a charge be displaced in this field without any external work being done on the charge?
A uniform electric field is
shown below. Draw equipotential surfaces. In which direction does
the voltage decrease? If an electron is placed in the electric
field at rest, draw the direction of the force. The electron moves
from higher potential point to lower potential point or the other
way around? If the potential difference between two locations of
the electron is 5V, what is the change in potential energy of the
electron. What is its speed at the end of...
Possibly useful equations: Electric force: F-kqqz/? Force from E field: F=qE Electric potential: V - kq/r PE-V Mag Fld near wire: B = d.l/2xr F-qvBsine E=q/4ter? Plate A: 100 cm long 1. The electric field lines running between a plate at 4 V and a plate at 0 V are observed to be as follows: A) Which plate (A or B) is the one at OV? How do you know? Plate B: 40 cm long B) On the above picture,...
The drawing shows a cross-sectional view of two spherical equipotential surfaces and two electric field lines that are perpendicular to these surfaces. When a proton with charge e moves from point B to point A the electric force does a positive work W (measured in joule). What is the electric potential differential V_B - V_A? W e W/e 0 Equal to V_C - V_B -W/e For the same problem above, what is the electric potential difference V_C - V_B? W...
(Figure 1) shows a region of space with an electric field.
Vertical lines indicate equipotential surfaces. A particle with
charge q = -4.8 nC is initially at the location of the -20-V
equipotential line. At time t = 0 the particle is released from
rest. Ignore the force exerted by Earth on the particle.
Part A: Estimate the magnitude of force exerted by the electric
field on the particle when it passes the 0-V equipotential
line.
Part B: Estimate the...
The equipotential surfaces in
the field map below (shown as dashed lines) have potential
differences between a point at infinity and themselves of 1V, 5V,
and 10V. (a)[4 pt(s) ]Label the surfaces with the correct voltage.
Justify your choices using the properties of electric potential and
its relation to work. (b)[3 pt(s) ]Is the work to move a +q charge
from points A to B positive, negative, or about zero? Justify using
the properties of work and electric potential. (c)[3...
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