Question 1

A point charge of +3.0 μC is located at the origin of a coordinate system and a second point charge of −9.0 μC is at x = 1.0 m.At what point on the x axis is the electrical potential zero?

Accepted Answer

A)   +0.33 m
B)   −0.25 m
C)   +0.25 m
D)   +0.75 mE) A) and C)
F) A) and B)

Question 2

A proton (+1.6 × 10−19 C) moves 10 cm along the direction of an electric field of strength 4.0 N/C.The electrical potential difference between the proton's initial and ending points is:

Accepted Answer

A)   4.8 × 10−19 V.
B)   0.40 V.
C)   0.044 V.
D)   6.4 × 10−19 V.E) None of the above
F) A) and C)

Question 3

An electron (charge −1.6 × 10−19 C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C.How much work is done on the electron as it moves 20 cm?

Accepted Answer

A)   1.6 × 10−20 J
B)   −4.8 × 10−20 J
C)   4.8 × 10−20 J
D)   zeroE) All of the above
F) B) and D)

Question 4

How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before it reaches "atmospheric breakdown" where E = 3.0 × 106 V/m? (ε0 = 8.85 × 10−12 C2/N⋅m2)

Accepted Answer

A)   6.6 × 10−7 C
B)   2.7 × 10−8 C
C)   5.3 × 10−8 C
D)   4.0 × 10−7 CE) A) and D)
F) B) and D)

Question 5

What is the equivalent capacitance between points a and b? All capacitors are 2.0 μF.

Accepted Answer

A)   1.2 µF
B)   0.25 µF
C)   4.0 µF
D)   0.60 µFE) C) and D)
F) None of the above

Question 6

If C = 48 µF,determine the equivalent capacitance for the combination shown.

Accepted Answer

A)   32 µF
B)   48 µF
C)   24 µF
D)   28 µFE) A) and C)
F) B) and C)

Question 7

If C = 14 µF,what is the equivalent capacitance for the combination shown?

Accepted Answer

A)   5.8 µF
B)   6.5 µF
C)   8.2 µF
D)   7.0 µFE) A) and D)
F) A) and C)

Question 8

Two capacitors with capacitances of 1.5 μC and 0.25 μF,respectively,are connected in parallel.The system is connected to a 40-V battery.What charge accumulates on the 1.5-μF capacitor?

Accepted Answer

A)   100 μC
B)   75 μC
C)   60 μC
D)   33 μCE) C) and D)
F) A) and D)

Question 9

Two particles each have the same mass but particle #1 has four times the charge of particle #2.Particle #1 is accelerated from rest through a potential difference of 10 V and attains speed v.Particle #2 is accelerated from rest also through a potential difference of 10 V.What speed does particle #2 attain?

Accepted Answer

A)   2v
B)   v/2
C)   v/4
D)  E) A) and D)
F) A) and B)

Question 10

A solid conducting sphere of 10 cm radius has a net charge of 40 nC.If the potential at infinity is taken as zero,what is the potential at the center of the sphere?

Accepted Answer

A)   360 μV
B)   3.6 × 103 V
C)   >3.6 × 104 V
D)   36 μVE) None of the above
F) A) and B)

Question 11

An ion is released from rest and moves due to the force from an electric field from a position in the field having a potential of 14 V to a position having a potential of 8 V.The ion:

Accepted Answer

A)   can have either a positive or a negative charge.
B)   must be neutral.
C)   must have a positive charge.
D)   must have a negative charge.E) A) and D)
F) C) and D)

Question 12

An electron in a TV picture tube is accelerated through a potential difference of 20 kV before it hits the screen.What is the kinetic energy of the electron in electron volts? (1 eV = 1.6 × 10−19 J)

Accepted Answer

A)   6.25 × 1022 eV
B)   1.0 × 104 eV
C)   2.0 × 104 eV
D)   3.2 × 10−22 eVE) A) and B)
F) A) and C)

Question 13

A solid metal sphere of radius r is inside a metal concentric spherical shell of inner radius 2r and outer radius 3r.A charge is place on the solid metal sphere and it is found that the potential at its surface is V​1 (at r) and that the potential at the outer surface of the spherical shell is V​3 (at 3r) .In terms of V​1 and V​3,what is the potential at the inner surface of the metal shell (at 2r) ?

Accepted Answer

A)   3V​1/2
B)   V​3
C)   V​1
D)   2V​3/2E) B) and D)
F) C) and D)

Question 14

A uniform electric field,with a magnitude of 600 N/C,is directed parallel to the positive x axis.If the potential at x = 4.0 m is 1000 V,what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (qp = 1.6 × 10−19 C)

Accepted Answer

A)   500 J
B)   2.9 × 10−16 J
C)   1.9 × 10−16 J
D)   8.0 × 10−17 JE) B) and C)
F) C) and D)

Question 15

When charges qa,qb,and qc are placed respectively at the corners a,b,and c of a right triangle,the potential at the midpoint of the hypotenuse is 20 V.When the charge qa is removed,the potential at the midpoint becomes 15 V.When,instead,the charge qb is removed (qa and qc both in place) ,the potential at the midpoint becomes 13 V.What is the potential at the midpoint if both charges qa and qc are removed?

Accepted Answer

A)   13 V
B)   7 V
C)   5 V
D)   8 VE) A) and D)
F) B) and D)

Question 16

Two parallel-plate capacitors have the same plate area,and the gap between the plates is filled with a dielectric with a dielectric constant equal to 6.The gap in capacitor A is three times that in capacitor B.What is the ratio of the capacitance of A to B?

Accepted Answer

A)   1/3
B)   The ratio is not given.
C)   3
D)   18E) B) and D)
F) B) and C)

Question 17

If C1 = 25 µF,C2 = 20 µF,C3 = 10 µF,and ΔV0 = 42 V,determine the energy stored by C3. 1 = 25 µF,C2 = 20 µF,C3 = 10 µF,and ΔV0 = 42 V,determine the energy stored by C3.   A)  3.6 mJ B)  0.32 mJ C)  1.8 mJ D)  0.40 mJ " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   3.6 mJ
B)   0.32 mJ
C)   1.8 mJ
D)   0.40 mJE) None of the above
F) B) and C)

Question 18

Very large capacitors have been considered as a means for storing electrical energy.If we constructed a very large parallel-plate capacitor of plate area 10 m2 using paper (κ = 3.7) of thickness 1.0 mm as a dielectric,how much electrical energy would it store at a plate voltage of 5000 V? (ε0 = 8.85 × 10−12 C2/N⋅m2)

Accepted Answer

A)   4.1 J
B)   8200 J
C)   0.41 J
D)   82,000 JE) All of the above
F) A) and D)

Question 19

A proton (+1.6 × 10−19 C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C.How much work is done on the proton by the electrical field?

Accepted Answer

A)   4.8 × 10−20 J
B)   1.6 × 10−20 J
C)   zero
D)   −4.8 × 10−20 JE) A) and B)
F) A) and D)

Question 20

Two capacitors with capacitances of 1.0 μC and 0.50 μF,respectively,are connected in series.The system is connected to a 150 V battery.What charge accumulates on the 1.0-μF capacitor?

Accepted Answer

A)   50 μC
B)   150 μC
C)   100 μC
D)   33 μCE) A) and D)
F) B) and C)

Exam 18: Direct-Current Circuits Sources of EMF: Part A

Correct Answer
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A proton (+1.6 × 10−¹⁹ C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C.How much work is done on the proton by the electrical field?

Correct Answer
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An electron (charge −1.6 × 10−¹⁹ C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C.How much work is done on the electron as it moves 20 cm?

Correct Answer
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Correct Answer
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An ion is released from rest and moves due to the force from an electric field from a position in the field having a potential of 14 V to a position having a potential of 8 V.The ion:

Correct Answer
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Two capacitors with capacitances of 1.5 μC and 0.25 μF,respectively,are connected in parallel.The system is connected to a 40-V battery.What charge accumulates on the 1.5-μF capacitor?

Correct Answer
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A uniform electric field,with a magnitude of 600 N/C,is directed parallel to the positive x axis.If the potential at x = 4.0 m is 1000 V,what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (q_p = 1.6 × 10−¹⁹ C)

Correct Answer
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Correct Answer
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If C = 48 µF,determine the equivalent capacitance for the combination shown.

Correct Answer
verified

A proton (+1.6 × 10−¹⁹ C) moves 10 cm along the direction of an electric field of strength 4.0 N/C.The electrical potential difference between the proton's initial and ending points is:

Correct Answer
verified

How much charge can be placed on a capacitor of plate area 20 cm² with air between the plates before it reaches "atmospheric breakdown" where E = 3.0 × 10⁶ V/m? (ε₀ = 8.85 × 10−¹² C²/N⋅m²)

Correct Answer
verified

Two capacitors with capacitances of 1.0 μC and 0.50 μF,respectively,are connected in series.The system is connected to a 150 V battery.What charge accumulates on the 1.0-μF capacitor?

Correct Answer
verified

Correct Answer
verified

A solid conducting sphere of 10 cm radius has a net charge of 40 nC.If the potential at infinity is taken as zero,what is the potential at the center of the sphere?

Correct Answer
verified

An electron in a TV picture tube is accelerated through a potential difference of 20 kV before it hits the screen.What is the kinetic energy of the electron in electron volts? (1 eV = 1.6 × 10−¹⁹ J)

Correct Answer
verified

If C = 14 µF,what is the equivalent capacitance for the combination shown?

Correct Answer
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If C₁ = 25 µF,C₂ = 20 µF,C₃ = 10 µF,and ΔV₀ = 42 V,determine the energy stored by C₃.

Correct Answer
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Two parallel-plate capacitors have the same plate area,and the gap between the plates is filled with a dielectric with a dielectric constant equal to 6.The gap in capacitor A is three times that in capacitor B.What is the ratio of the capacitance of A to B?

Correct Answer
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A point charge of +3.0 μC is located at the origin of a coordinate system and a second point charge of −9.0 μC is at x = 1.0 m.At what point on the x axis is the electrical potential zero?

Correct Answer
verified

What is the equivalent capacitance between points a and b? All capacitors are 2.0 μF.

Correct Answer
verified

Exam 18: Direct-Current Circuits Sources of EMF: Part A

Correct AnswerverifiedShow Answer

A proton (+1.6 × 10−19 C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C.How much work is done on the proton by the electrical field?

Correct AnswerverifiedShow Answer

An electron (charge −1.6 × 10−19 C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C.How much work is done on the electron as it moves 20 cm?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An ion is released from rest and moves due to the force from an electric field from a position in the field having a potential of 14 V to a position having a potential of 8 V.The ion:

Correct AnswerverifiedShow Answer

Two capacitors with capacitances of 1.5 μC and 0.25 μF,respectively,are connected in parallel.The system is connected to a 40-V battery.What charge accumulates on the 1.5-μF capacitor?

Correct AnswerverifiedShow Answer

A uniform electric field,with a magnitude of 600 N/C,is directed parallel to the positive x axis.If the potential at x = 4.0 m is 1000 V,what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (qp = 1.6 × 10−19 C)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If C = 48 µF,determine the equivalent capacitance for the combination shown.

Correct AnswerverifiedShow Answer

A proton (+1.6 × 10−19 C) moves 10 cm along the direction of an electric field of strength 4.0 N/C.The electrical potential difference between the proton's initial and ending points is:

Correct AnswerverifiedShow Answer

How much charge can be placed on a capacitor of plate area 20 cm2 with air between the plates before it reaches "atmospheric breakdown" where E = 3.0 × 106 V/m? (ε0 = 8.85 × 10−12 C2/N⋅m2)

Correct AnswerverifiedShow Answer

Two capacitors with capacitances of 1.0 μC and 0.50 μF,respectively,are connected in series.The system is connected to a 150 V battery.What charge accumulates on the 1.0-μF capacitor?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A solid conducting sphere of 10 cm radius has a net charge of 40 nC.If the potential at infinity is taken as zero,what is the potential at the center of the sphere?

Correct AnswerverifiedShow Answer

An electron in a TV picture tube is accelerated through a potential difference of 20 kV before it hits the screen.What is the kinetic energy of the electron in electron volts? (1 eV = 1.6 × 10−19 J)

Correct AnswerverifiedShow Answer

If C = 14 µF,what is the equivalent capacitance for the combination shown?

Correct AnswerverifiedShow Answer

If C1 = 25 µF,C2 = 20 µF,C3 = 10 µF,and ΔV0 = 42 V,determine the energy stored by C3.

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Two parallel-plate capacitors have the same plate area,and the gap between the plates is filled with a dielectric with a dielectric constant equal to 6.The gap in capacitor A is three times that in capacitor B.What is the ratio of the capacitance of A to B?

Correct AnswerverifiedShow Answer

A point charge of +3.0 μC is located at the origin of a coordinate system and a second point charge of −9.0 μC is at x = 1.0 m.At what point on the x axis is the electrical potential zero?

Correct AnswerverifiedShow Answer

What is the equivalent capacitance between points a and b? All capacitors are 2.0 μF.

Correct AnswerverifiedShow Answer

Correct Answer
verified

A proton (+1.6 × 10−¹⁹ C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C.How much work is done on the proton by the electrical field?

Correct Answer
verified

An electron (charge −1.6 × 10−¹⁹ C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C.How much work is done on the electron as it moves 20 cm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A uniform electric field,with a magnitude of 600 N/C,is directed parallel to the positive x axis.If the potential at x = 4.0 m is 1000 V,what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (q_p = 1.6 × 10−¹⁹ C)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A proton (+1.6 × 10−¹⁹ C) moves 10 cm along the direction of an electric field of strength 4.0 N/C.The electrical potential difference between the proton's initial and ending points is:

Correct Answer
verified

How much charge can be placed on a capacitor of plate area 20 cm² with air between the plates before it reaches "atmospheric breakdown" where E = 3.0 × 10⁶ V/m? (ε₀ = 8.85 × 10−¹² C²/N⋅m²)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An electron in a TV picture tube is accelerated through a potential difference of 20 kV before it hits the screen.What is the kinetic energy of the electron in electron volts? (1 eV = 1.6 × 10−¹⁹ J)

Correct Answer
verified

Correct Answer
verified

If C₁ = 25 µF,C₂ = 20 µF,C₃ = 10 µF,and ΔV₀ = 42 V,determine the energy stored by C₃.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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