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ELECTRIC FIELD WORKSHEET
1. A beam of electrons is directed into the electric field
between two oppositely charged parallel plates, as shown
in the diagram below.
The electrostatic force exerted on the electrons by the
electric field is directed
A)
B)
C)
D)
toward the top of the page
out of the page
into the page
toward the bottom of the page
2. The diagram below shows the arrangement of three
charged hollow metal spheres, A, B, and C. The arrows
indicate the direction of the electric forces acting
between the spheres. At least two of the spheres are
positively charged.
Which sphere, if any, could be negatively charged?
A) sphere A
C) sphere C
B) sphere B
D) no sphere
NAME:________________
Base your answers to questions 3 and 4 on the diagram
below which represents two large parallel conducting
plates charged to a potential of 10. volts. The plates are
separated by a distance of 0.050 meter.
3. Compared to the magnitude of the electric field intensity
at point P, the magnitude of the electric field intensity at
point A is
A) less
C) the same
B) greater
4. The direction of the electric field at point P is toward
point
A) A
B) B
C) C
D) D
5. Base your answer to the following question on the
information and diagram below.
7. Identical charges A, B, and C are located between two
oppositely charged parallel plates, as shown in the
diagram below.
Two small metallic spheres, A and B, are
separated by a distance of 4.0 × 10–1 meter, as
shown. The charge on each sphere is +1.0 × 10–6
coulomb. Point P is located near the spheres.
The magnitude of the force exerted on the charges by
the electric field between the plates is
A)
B)
C)
D)
Which arrow best represents the direction of the
resultant electric field at point P due to the charges on
spheres A and B?
A)
B)
C)
D)
6. Base your answer to the following question on the
accompanying diagram which represents two large
parallel plates which are oppositely charged. A, B, and C
are reference points.
If an electron is moved from point A to point C, the
potential energy of the electron will
A) decrease
C) remain the same
B) increase
the same on A and C, but less on B
the same for A, B, and C
greatest on A and least on C
least on A and greatest on C
8. The diagram below represents an electron beam entering
the region between two oppositely charged parallel
plates.
In which direction will the beam of electrons be
deflected?
A)
B)
C)
D)
into the page
out of the page
toward the bottom of the page
toward the top of the page
9. At point P in an electric field, the magnitude of the
electrostatic force on a proton is 4.0 × 10 –10 newton.
What is the magnitude of the electric field intensity at
point P?
A) 4.0 × 10 –10 N/C
C) 1.6 × 10 –19 N/C
B) 2.5 × 10 9 N/C
D) 6.4 × 10 –29 N/C
10. The diagram below represents an electron within an
electric field between two parallel plates that are
charged with a potential difference of 40.0 volts.
If the magnitude of the electric force on the electron is
2.00 ×10 –15 newton, the magnitude of the electric field
strength between the charged plates is
A) 3.20
C) 1.25
10 –34 N/C
10 4 N/C
B) 2.00
D) 2.00
10 –14 N/C
10 16 N/C
11. The diagram below represents the electric field
surrounding two charged spheres. A and B.
13. Base your answer to the following question on the
diagram below which shows two identical metal
spheres. Sphere A has a charge of +12 coulombs and
sphere B is a neutral sphere.
After contact, the spheres are moved apart. As the
distance between the spheres is increased, the electric
potential energy of the system
A) decreases
C) remains the same
B) increases
14. An electron is located in the electric field between two
parallel metal plates as shown in the diagram below.
If the electron is attracted to plate A, then plate A is
charged
What is the sign of the charge of each sphere?
A)
B)
C)
D)
Both spheres are negative
Sphere A is negative and sphere B is positive.
Sphere A is positive and sphere B is negative.
Both spheres are positive.
12. An electrostatic force of 20. Newtons is exerted on a
charge of 8.0 × 10-2 coulomb at point P in an electric
field. The magnitude of the electric field intensity at P
is
A) 4.0 × 10 –3 N/C
C) 1.6 N/C
A) positively, and the electric field is directed from
plate A toward plate B
B) positively, and the electric field is directed from
plate B toward plate A
C) negatively, and the electric field is directed from
plate A toward plate B
D) negatively, and the electric field is directed from
plate B toward plate A
15. An electron placed between oppositely charged parallel
plates A and B moves toward plate A, as represented in
the diagram below
B) 20. N/C
D) 2.5 × 10 2 N/C
What is the direction of the electric field between the
plates?
A) toward plate B
C) out of the page
B) toward plate A
D) into the page
16. In the diagram below, P is a point near a negatively
charged sphere.
Which vector best represents the direction of the
electric field at point P?
A)
B)
C)
D)
17. An object with a net charge of 4.80 × 10–6 coulomb
experiences an electrostatic force having a magnitude
of 6.00 × 10 –2 Newtons when placed near a negatively
charged metal sphere. What is the electric field strength
at this location?
A)
B)
C)
D)
1.25 × 10 4 N/C directed toward the sphere
2.88 × 10 –8 N/C directed away from the sphere
1.25 × 10 4 N/C directed away from the sphere
2.88 × 10 –8 N/C directed toward the sphere
18. Which graph best represents the relationship between the magnitude of the electric field strength, E,
around a point charge and the distance, r, from the point charge?
A)
B)
C)
D)
19. The diagram below represents a source of potential
difference connected to two large, parallel metal plates
separated by a distance of 4.0 × 10 –3 meter.
Which statement best describes the electric field
strength between the plates?
A)
B)
C)
D)
It is zero at point B.
It is the same at points A, B, and C.
It is a maximum at point B.
It is a maximum at point C.
22. Two positively charged masses are separated by a
distance, r. Which statement best describes the
gravitational and electrostatic forces between the two
masses?
A) Both forces are attractive.
B) The gravitational force is attractive and the
electrostatic force is repulsive.
C) The gravitational force is repulsive and the
electrostatic force is attractive.
D) Both forces are repulsive.
23. Base your answer to the following question on the
diagram below which represents two small charged
spheres, A and B, 3 meters apart. Each sphere has a
charge of +2.0 × 10–6C.
20. The diagram below shows two identical metal spheres,
A and B, separated by distance d. Each sphere has mass
m and possesses charge q.
Which diagram best illustrates the electric field
between charges A and B?
Which diagram best represents the electrostatic force Fe
and the gravitational force Fg acting on sphere B due
to sphere A?
A)
B)
C)
D)
21. What is the magnitude of the electric field intensity at a
point where a proton experiences an electrostatic force
of magnitude 2.30 × 10–25 newton?
A) 1.44 × 10 –6 N/C
C) 3.68 × 10 –44 N/C
B) 1.44 × 10 44 N/C
D) 3.68 × 10 6 N/C
A)
B)
C)
D)
Answer Key
electro fields
1.
A
2.
A
3.
C
4.
A
5.
D
6.
B
7.
B
8.
D
9.
B
10.
C
11.
B
12.
D
13.
A
14.
A
15.
A
16.
C
17.
A
18.
C
19.
B
20.
C
21.
A
22.
B
23.
A