Question 1

A 20-g ball with 2  μ\muμ C of charge is placed 1 m away from a fixed 1-C charge and released.How fast is the charge moving a very long time later?

Accepted Answer

A)  2500 m/s
B)  750 m/s
C)  3400 m/s
D)  1300 m/s
E)  4200 m/s

Question 2

A point charge of 5.0 3 V B) 2.6 * 103 V C) 3.7 * 103 V D) 5.2 * 103 V E) 7.9 * 103 V " class="answers-bank-image d-inline" rel="preload" > is located at (2.5 m,4.1 m) .A second point charge of 3 V B) 2.6 * 103 V C) 3.7 * 103 V D) 5.2 * 103 V E) 7.9 * 103 V " class="answers-bank-image d-inline" rel="preload" > 3 V B) 2.6 * 103 V C) 3.7 * 103 V D) 5.2 * 103 V E) 7.9 * 103 V " class="answers-bank-image d-inline" rel="preload" > is located at (-2.0 m,1.0 m) .What is the electric potential at the origin?

Accepted Answer

A)  1.4 * 103 V
B)  2.6 * 103 V
C)  3.7 * 103 V
D)  5.2 * 103 V
E)  7.9 * 103 V

Question 3

A 5.0 V battery is connected to two parallel metal plates placed in a vacuum.An electron is accelerated from rest from the negative plate toward the positive plate.What kinetic energy does the electron have as it just reaches the positive plate?

Accepted Answer

A)  5.6 * 10-19 J
B)  6.1 * 10-19 J
C)  8.0 * 10-19 J
D)  8.9 * 10-19 J
E)  9.7 * 10-19 J

Question 4

A point charge is moved against a potential difference of + 20 V.The work done by the force moving the charge is 25 µJ.What is the charge?

Accepted Answer

A)  5.0 µC
B)  2.5 µC
C)  1.3 µC
D)  0.80 µC
E)  1.0 µC

Question 5

How much work would be required to move an electron from 0.0529 * 10-9 m from a proton to four times that distance?

Accepted Answer

A)  5.4 * 10-18J
B)  3.3 * 10-18J
C)  1.6 * 10-18J
D)  None are correct.

Question 6

Two charges Q1 = 4.4  μ\muμ C and Q2 = -3.9  μ\muμ C are located on the x-axis at x1 = -80 m and x2 = 87 m.What is the electric potential at x = 52 m?

Accepted Answer

A)  0.125 V
B)  -0.125 V
C)  0 V
D)  703 V
E)  -703 V

Question 7

Two point charges are located at two corners of a triangle as shown.What is the electric potential at the right corner of the triangle? 5 V B) 3.4 * 105 V C) 4.5 * 105 V D) 6.3 * 105 V E) 7.2 * 105 V " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2.1 * 105 V
B)  3.4 * 105 V
C)  4.5 * 105 V
D)  6.3 * 105 V
E)  7.2 * 105 V

Question 8

An infinite plane of charge has a planar charge density of + 2.2 nC/m2 and is located in the yz plane at x=0.A + 3.3 nC fixed point charge is located at x = + 1.0 m.At what position on the x-axis between x = 0.0 m and x = + 1.0 m is the electric potential a minimum?

Accepted Answer

A)  0.49 m
B)  0.31 m
C)  0.65 m
D)  0.51 m
E)  0.69 m

Question 9

The electric potential at a point is space is given by the relation V = 23x - 27y + 11y2 + 72.What is the x-component of the electric field (in V/m) at the point r = (3.0,2.0,1.0) ?

Accepted Answer

A)  -23
B)  -95
C)  95
D)  -17
E)  -29

Question 10

A cartoon dog obtains a voltage of 17,000 V in his fur by scuffing his feet on the carpet.If he can be treated as a sphere of radius 12 cm,how much charge is on his fur?

Accepted Answer

A)  1.2 * 10-8 C
B)  2.7 * 10-8 C
C)  3.4 * 10-8 C
D)  1.4 * 10-7 C
E)  2.3 * 10-7 C

Question 11

The potential energy of a system of three 2  μ\muμ C charges arranged in an equilateral triangle is 0.54 J What is the length of one side of this triangle?

Accepted Answer

A)  20 cm
B)  51 cm
C)  85 cm
D)  33 cm
E)  62 cm

Question 12

In Rutherford's famous experiment,alpha particles of mass 6.64 * 10-27 kg and charge + 2e were fired directly at a gold nucleus (charge + 79e) with a speed of 3 * 107 m/s.Due to the Coulomb repulsive force the alpha particles slowed down and eventually came to rest momentarily before turning around.The distance alpha particles came closest to the gold nucleus before turning around was

Accepted Answer

A)  27.4 fm.
B)  15.1 fm.
C)  12.1 fm.
D)  9.8 fm.
E)  5.4 fm.

Question 13

Two charged particles,Q1 = + 12.0 mC,Q2 = -5.0mC are placed on a line.At what finite locations along the line may the electric potential be equal to zero? I.in between the particles,closer to the positive particle
II.in between the particles,closer to the negative particle
III.not in between,but closer to the positive particle
IV.not in between,but closer to the negative particle
V.It can never be zero.

Accepted Answer

A)  I only
B)  II only
C)  V only
D)  I and IV
E)  II and IV

Question 14

An electron is accelerated from rest through a potential difference of 450 V.What is its final speed?

Accepted Answer

A)  0.81 * 107 m/s
B)  1.3 * 107 m/s
C)  2.9 * 107 m/s
D)  4.1 * 107 m/s

Question 15

How much charge must be placed on a 10 cm diameter metal sphere so that the electric potential at the center of the sphere is 1.0 V? Assume that the electric potential is zero at points infinitely far away from the sphere.

Accepted Answer

A)  2.8 * 10-13 C
B)  1.1 * 10-12 C
C)  5.6 * 10-12 C
D)  1.1 * 10-11 C
E)  2.2 * 10-11 C

Question 16

What is the potential energy of a system of three 2  μ\muμ C charges arranged in an equilateral triangle of side 20 cm?

Accepted Answer

A)  0.54 J
B)  0.32 J
C)  0.74 J
D)  0.18 J
E)  0.26 J

Question 17

An electron (mass: 9.11 * 10-31 kg) and a proton (mass: 1.67 * 10-27 kg) are each accelerated from rest through a potential difference of 15 V that spans 15 cm.Which one takes less time to cover the 15 cm distance?

Accepted Answer

A)  It's a tie-each reaches 15cm at the same time.
B)  There isn't enough information given to answer this question.
C)  The electron beats the proton.
D)  The proton beats the electron.

Question 18

An electric potential has the value (22V/m) (y) - (13V/m2 ) (z-3m) 2.What is the electric field at the origin?

Accepted Answer

A)  -22V/m ŷ
B)  -78V/m ẑ
C)  + 56V/m
D)  -22V/m ŷ - 78V/m ẑ
E)  + 22 V/m ŷ + 78V/m ẑ

Question 19

A metal sphere of radius R = 30 cm carries a total charge Q = 2.0  μ\muμ C.A charge is located 5 m from the center of the sphere.How much work does it take to move the charge to a point exactly on the opposite side of the sphere,5 m away from the center,on the negative x-axis?

Accepted Answer

A)  1440 J
B)  0 J
C)  -1440 J
D)  3.2 * 10-6 J
E)  -3.2 * 10-6 J

Question 20

In large televisions,electrons are accelerated from rest by a potential difference of 20 kV and shot onto a phosphorescent screen to produce an image.What is the speed of the electrons when they reach the screen?

Accepted Answer

A)  1.4 * 106 m/s
B)  1.3 * 107 m/s
C)  4.4 * 107 m/s
D)  5.9 * 107 m/s
E)  8.4 * 107 m/s

Exam 23: Electric Potential

An infinite plane of charge has a planar charge density of + 2.2 nC/m² and is located in the yz plane at x=0.A + 3.3 nC fixed point charge is located at x = + 1.0 m.At what position on the x-axis between x = 0.0 m and x = + 1.0 m is the electric potential a minimum?

Correct Answer
verified

An electric potential has the value (22V/m) (y) - (13V/m² ) (z-3m) ².What is the electric field at the origin?

Correct Answer
verified

A point charge is moved against a potential difference of + 20 V.The work done by the force moving the charge is 25 µJ.What is the charge?

Correct Answer
verified

A point charge of 5.0 is located at (2.5 m,4.1 m) .A second point charge of is located at (-2.0 m,1.0 m) .What is the electric potential at the origin?

Correct Answer
verified

Two point charges are located at two corners of a triangle as shown.What is the electric potential at the right corner of the triangle?

Correct Answer
verified

An electron is accelerated from rest through a potential difference of 450 V.What is its final speed?

Correct Answer
verified

Correct Answer
verified

A 5.0 V battery is connected to two parallel metal plates placed in a vacuum.An electron is accelerated from rest from the negative plate toward the positive plate.What kinetic energy does the electron have as it just reaches the positive plate?

Correct Answer
verified

How much charge must be placed on a 10 cm diameter metal sphere so that the electric potential at the center of the sphere is 1.0 V? Assume that the electric potential is zero at points infinitely far away from the sphere.

Correct Answer
verified

An electron (mass: 9.11 * 10^-31 kg) and a proton (mass: 1.67 * 10^-27 kg) are each accelerated from rest through a potential difference of 15 V that spans 15 cm.Which one takes less time to cover the 15 cm distance?

Correct Answer
verified

The electric potential at a point is space is given by the relation V = 23x - 27y + 11y² + 72.What is the x-component of the electric field (in V/m) at the point r = (3.0,2.0,1.0) ?

Correct Answer
verified

The potential energy of a system of three 2 $\mu$ C charges arranged in an equilateral triangle is 0.54 J What is the length of one side of this triangle?

Correct Answer
verified

A 20-g ball with 2 $\mu$ C of charge is placed 1 m away from a fixed 1-C charge and released.How fast is the charge moving a very long time later?

Correct Answer
verified

How much work would be required to move an electron from 0.0529 * 10^-9 m from a proton to four times that distance?

Correct Answer
verified

A cartoon dog obtains a voltage of 17,000 V in his fur by scuffing his feet on the carpet.If he can be treated as a sphere of radius 12 cm,how much charge is on his fur?

Correct Answer
verified

In large televisions,electrons are accelerated from rest by a potential difference of 20 kV and shot onto a phosphorescent screen to produce an image.What is the speed of the electrons when they reach the screen?

Correct Answer
verified

Two charges Q₁ = 4.4 $\mu$ C and Q₂ = -3.9 $\mu$ C are located on the x-axis at x₁ = -80 m and x₂ = 87 m.What is the electric potential at x = 52 m?

Correct Answer
verified

Correct Answer
verified

What is the potential energy of a system of three 2 $\mu$ C charges arranged in an equilateral triangle of side 20 cm?

Correct Answer
verified

A metal sphere of radius R = 30 cm carries a total charge Q = 2.0 $\mu$ C.A charge is located 5 m from the center of the sphere.How much work does it take to move the charge to a point exactly on the opposite side of the sphere,5 m away from the center,on the negative x-axis?

Correct Answer
verified

Exam 23: Electric Potential

An infinite plane of charge has a planar charge density of + 2.2 nC/m2 and is located in the yz plane at x=0.A + 3.3 nC fixed point charge is located at x = + 1.0 m.At what position on the x-axis between x = 0.0 m and x = + 1.0 m is the electric potential a minimum?

Correct AnswerverifiedShow Answer

An electric potential has the value (22V/m) (y) - (13V/m2 ) (z-3m) 2.What is the electric field at the origin?

Correct AnswerverifiedShow Answer

A point charge is moved against a potential difference of + 20 V.The work done by the force moving the charge is 25 µJ.What is the charge?

Correct AnswerverifiedShow Answer

A point charge of 5.0 is located at (2.5 m,4.1 m) .A second point charge of is located at (-2.0 m,1.0 m) .What is the electric potential at the origin?

Correct AnswerverifiedShow Answer

Two point charges are located at two corners of a triangle as shown.What is the electric potential at the right corner of the triangle?

Correct AnswerverifiedShow Answer

An electron is accelerated from rest through a potential difference of 450 V.What is its final speed?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A 5.0 V battery is connected to two parallel metal plates placed in a vacuum.An electron is accelerated from rest from the negative plate toward the positive plate.What kinetic energy does the electron have as it just reaches the positive plate?

Correct AnswerverifiedShow Answer

How much charge must be placed on a 10 cm diameter metal sphere so that the electric potential at the center of the sphere is 1.0 V? Assume that the electric potential is zero at points infinitely far away from the sphere.

Correct AnswerverifiedShow Answer

An electron (mass: 9.11 * 10-31 kg) and a proton (mass: 1.67 * 10-27 kg) are each accelerated from rest through a potential difference of 15 V that spans 15 cm.Which one takes less time to cover the 15 cm distance?

Correct AnswerverifiedShow Answer

The electric potential at a point is space is given by the relation V = 23x - 27y + 11y2 + 72.What is the x-component of the electric field (in V/m) at the point r = (3.0,2.0,1.0) ?

Correct AnswerverifiedShow Answer

The potential energy of a system of three 2 μ\muμ C charges arranged in an equilateral triangle is 0.54 J What is the length of one side of this triangle?

Correct AnswerverifiedShow Answer

A 20-g ball with 2 μ\muμ C of charge is placed 1 m away from a fixed 1-C charge and released.How fast is the charge moving a very long time later?

Correct AnswerverifiedShow Answer

How much work would be required to move an electron from 0.0529 * 10-9 m from a proton to four times that distance?

Correct AnswerverifiedShow Answer

A cartoon dog obtains a voltage of 17,000 V in his fur by scuffing his feet on the carpet.If he can be treated as a sphere of radius 12 cm,how much charge is on his fur?

Correct AnswerverifiedShow Answer

In large televisions,electrons are accelerated from rest by a potential difference of 20 kV and shot onto a phosphorescent screen to produce an image.What is the speed of the electrons when they reach the screen?

Correct AnswerverifiedShow Answer

Two charges Q1 = 4.4 μ\muμ C and Q2 = -3.9 μ\muμ C are located on the x-axis at x1 = -80 m and x2 = 87 m.What is the electric potential at x = 52 m?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What is the potential energy of a system of three 2 μ\muμ C charges arranged in an equilateral triangle of side 20 cm?

Correct AnswerverifiedShow Answer

A metal sphere of radius R = 30 cm carries a total charge Q = 2.0 μ\muμ C.A charge is located 5 m from the center of the sphere.How much work does it take to move the charge to a point exactly on the opposite side of the sphere,5 m away from the center,on the negative x-axis?

Correct AnswerverifiedShow Answer

An infinite plane of charge has a planar charge density of + 2.2 nC/m² and is located in the yz plane at x=0.A + 3.3 nC fixed point charge is located at x = + 1.0 m.At what position on the x-axis between x = 0.0 m and x = + 1.0 m is the electric potential a minimum?

Correct Answer
verified

An electric potential has the value (22V/m) (y) - (13V/m² ) (z-3m) ².What is the electric field at the origin?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An electron (mass: 9.11 * 10^-31 kg) and a proton (mass: 1.67 * 10^-27 kg) are each accelerated from rest through a potential difference of 15 V that spans 15 cm.Which one takes less time to cover the 15 cm distance?

Correct Answer
verified

The electric potential at a point is space is given by the relation V = 23x - 27y + 11y² + 72.What is the x-component of the electric field (in V/m) at the point r = (3.0,2.0,1.0) ?

Correct Answer
verified

The potential energy of a system of three 2 $\mu$ C charges arranged in an equilateral triangle is 0.54 J What is the length of one side of this triangle?

Correct Answer
verified

A 20-g ball with 2 $\mu$ C of charge is placed 1 m away from a fixed 1-C charge and released.How fast is the charge moving a very long time later?

Correct Answer
verified

How much work would be required to move an electron from 0.0529 * 10^-9 m from a proton to four times that distance?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Two charges Q₁ = 4.4 $\mu$ C and Q₂ = -3.9 $\mu$ C are located on the x-axis at x₁ = -80 m and x₂ = 87 m.What is the electric potential at x = 52 m?

Correct Answer
verified

Correct Answer
verified

What is the potential energy of a system of three 2 $\mu$ C charges arranged in an equilateral triangle of side 20 cm?

Correct Answer
verified

A metal sphere of radius R = 30 cm carries a total charge Q = 2.0 $\mu$ C.A charge is located 5 m from the center of the sphere.How much work does it take to move the charge to a point exactly on the opposite side of the sphere,5 m away from the center,on the negative x-axis?

Correct Answer
verified