Question

This is from an lab dealing with electric feild and equipotential lines.

1.If the electric potential between two points is zero, what does that mean in terms of the electric field in terms of the test charge?

2. Is the electric field a vector a scalar field? Explain

3. Why must equipotential lines be perpendicular to electric field lines?

4. How much work is required to move a small test charge along an equipotential line?

5. Find the electric field strength 6.0 cm from a 4.5μC charge.

6. Draw a vector diagram and calculate the electric field strength half way between a 4.5μC charge and a -4.5μC charge separated by 1.0cm

Please answer completely

Answer #1

1) the elecric field is perpendicular to the line joining the two points, work done in taking a test charge from one point to other is 0.

2) its a vector quantity as it is directed away from positive and towards negative charge

3)

so if change in potential is zero

E.l =0

E should be perpendicular to l

4) zero

5) E = kq/r^{2}

k = 9x 10^{9} units

q =4.5μC

r = 0.06 m

plugging in the values we get

E =1.125 x 10^{7} N/C

6) electric field would be twice of electric field due to each charge

E1 =kq/r^{2}

q =4.5μC

r = 0.5cm

plugging in we get

E1 = 1.62 x10^{9} N/C

net electric field

E =2E1 = 3.24 x 10^{9} N/C

Which statement regarding electric potential is NOT
accurate?
a.
Electric potential is measured in
units of volts.
b.
Electric potential depends on the
position in an electric field.
c.
Electric potential depends on the
amount of charge on a particle in an electric field.
d.
Electric potential depends on the
strength of the electric field at a given position.
Question
6 of 20
Which of the following statements regarding equipotentials and
electric fields is accurate?
a.
Electric field lines are...

6-With a labelled sketch, illustrate the electric field and
equipotential lines about a point charge. [2 marks] (b) A dipole,
as illustrated in the following figure, consists of two charges of
charge magnitude, q separated by a distance, d. Point P is
separated from the dipole center by a distance, r along the x-axis.
For this: i) sketch and label the electric field vector
contributions at P due to the two point charges and the resultant
net field vector at...

1.Draw the equipotential lines for a single, positive,
charge.
2. How can you tell from an electric field map whether an
electric field is strong or weak?
3. What would the electric field lines look like if the electric
field was constant?
4. Can there be a point in space where there is an electric
potential but not electric field? Can there be a point in space
where there is an electric field but no electric potential? Explain
you answer.

Physics Lab: Electric Potential and Field
Plotting
1. What is an electric field?
2. What is the significance of electric field lines being close
together in some areas and far apart in others?
3. Explain why electric fields must be at right angles to
equipotential lines.
I know this is three questions in one, any help is
appreciated.

a. Determine the work in joules required to move a charge of 20
Coulombs through a potential of 24 volts?
b. Find the electric field in N/C, if a force of 4 N is required
to move a charge of 20 Coulombs?
c. Which of the following statements are true or false?
Electric field lines are everywhere perpendicular to the
equipotential lines
An equipotential line is the locus of a set of points all of
which have the same potential...

Suppose that a positive test charge q0 moves through a
displacement d s→from one equipotential surface to the adjacent
surface. The work the electric field does on the test charge during
the move is –q0dV. The work done by the electric field may also be
written as the scalar product (q0E→)·d s→, or q0E(cos θ) ds.
It's a general question what if the test charge is negative?
what happens to the displacement and work?

Begin with a single point charge and use the voltage
plotting tool to create an equipotential curve around the point
charge. Use an orange electric field sensor to investigate the
relationship between the direction of the electric field and the
orientation of the equipotential curve. Are the two parallel or
perpendicular, or do they have some other more complicated
relationship? Does this relationship hold for more complicated
arrangements of charge, dipoles, and quadrupoles?
l
Recall the definition of work: work...

In a constant uniform electric field, a particle with charge
−100 ?? is moved from the origin a distance ? = 0.80 ? straight in
the direction of the electric field lines. The field has a strength
of 5.0 ? ? .
a) What is the voltage difference between the initial and final
position?
b) How much work is done to move the charge?
c) Does the charge gain or lose electrical potential energy in
the process of this move?...

Do charges released from rest always move along electric field
lines; i.e., does the charge stay on the E field line at which it
started?
b) Based on your answer to a), would charges released with an
initial velocity always move along electric field lines?
c) Using kinematic quantities like position, velocity, and
acceleration as well as the concept of a force to describe the
general character of the motion of a [+] charge in motion near a
single [+]...

Lab 20: Electric Field and Potential
Pre Lab Questions (Part 2)
6. How can you tell from an electric field map whether an
electric field is strong or weak?
7. What would the electric field lines look like if the electric
field was constant?
8. Can there be a point in space where there is an electric
potential but not electric field? Can there be a point in space
where there is an electric field but no electric potential? Explain...

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