Question 1

A particle (q = +5.0 μC) is released from rest when it is 2.0 m from a charged particle which is held at rest.After the positively charged particle has moved 1.0 m toward the fixed particle,it has a kinetic energy of 50 mJ.What is the charge on the fixed particle?

Accepted Answer

A)  −2.2 μC
B)  +6.7 μC
C)  −2.7 μC
D)  +8.0 μC
E)  −1.1 μCF) None of the above
G) A) and B)

Question 2

Charge of uniform linear density 3.0 nC/m is distributed along the x axis from x = 0 to x = 3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +4 m on the x axis?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and B)

Question 3

A charge of 18 nC is uniformly distributed along the y axis from y = 3 m to y = 5 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +2 m on the x axis?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) C) and E)
G) B) and D)

Question 4

A charge is placed on a spherical conductor of radius r1.This sphere is then connected to a distant sphere of radius r2 (not equal to r1) by a conducting wire.After the charges on the spheres are in equilibrium,

Accepted Answer

A)  the electric fields at the surfaces of the two spheres are equal.
B)  the amount of charge on each sphere is q/2.
C)  both spheres are at the same potential.
D)  the potentials are in the ratio 1.This sphere is then connected to a distant sphere of radius r2 (not equal to r1) by a conducting wire.After the charges on the spheres are in equilibrium, 
A)  the electric fields at the surfaces of the two spheres are equal. 
B)  the amount of charge on each sphere is q/2. 
C)  both spheres are at the same potential. 
D)  the potentials are in the ratio   . 
E)  the potentials are in the ratio   . " class="answers-bank-image d-inline" rel="preload" > .
E)  the potentials are in the ratio 1.This sphere is then connected to a distant sphere of radius r2 (not equal to r1) by a conducting wire.After the charges on the spheres are in equilibrium, 
A)  the electric fields at the surfaces of the two spheres are equal. 
B)  the amount of charge on each sphere is q/2. 
C)  both spheres are at the same potential. 
D)  the potentials are in the ratio   . 
E)  the potentials are in the ratio   . " class="answers-bank-image d-inline" rel="preload" > .F) A) and E)
G) A) and B)

Question 5

Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm × 80-cm rectangle.If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle,determine the potential difference,VB − VA.

Accepted Answer

A)  −47 V
B)  +94 V
C)  zero
D)  −94 V
E)  +47 VF) A) and C)
G) B) and D) D

Question 6

Several charges in the neighborhood of point P produce an electric potential of 6.0 kV (relative to zero at infinity) and an electric field of 
N/C at point P.Determine the work required of an external agent to move a 3.0-μC charge along the x axis from infinity to point P without any net change in the kinetic energy of the particle.

Accepted Answer

A)  21 mJ
B)  18 mJ
C)  24 mJ
D)  27 mJ
E)  12 mJF) A) and C)
G) C) and D)

Question 7

Two identical particles,each with a mass of 2.0 μg and a charge of 25 nC,are released simultaneously from rest when the two are 4.0 cm apart.What is the speed of either particle at the instant when the two are separated by 10 cm?

Accepted Answer

A)  7.3 m/s
B)  9.8 m/s
C)  9.2 m/s
D)  6.5 m/s
E)  4.6 m/sF) A) and D)
G) A) and E)

Question 8

A system consisting of a negatively-charged particle and an electric field

Accepted Answer

A)  gains potential difference and kinetic energy when the charged particle moves in the direction of the field.
B)  loses electric potential energy when the charged particle moves in the direction of the field.
C)  gains kinetic energy when the charged particle moves in the direction of the field.
D)  gains electric potential energy when the charged particle moves in the direction of the field.
E)  gains potential difference and electric potential energy when the charged particle moves in the direction of the field.F) D) and E)
G) B) and E)

Question 9

The electric field in the region defined by the y-z plane and the negative x axis is given by E = −ax,where a is a constant.(There is no field for positive values of x. ) As −x increases in magnitude,relative to V = 0 at the origin,the electric potential in the region defined above is

Accepted Answer

A)  a decreasing function proportional to −|x2|.
B)  a decreasing function proportional to −|x|.
C)  constant.
D)  an increasing function proportional to +|x|.
E)  an increasing function proportional to +|x2|.F) All of the above
G) C) and D)

Question 10

Identical 4.0-μC charges are placed on the y axis at y = ±4.0 m.Point A is on the x axis at x = +3.0 m.Determine the electric potential of point A (relative to zero at the origin) .

Accepted Answer

A)  −4.5 kV
B)  −2.7 kV
C)  −1.8 kV
D)  −3.6 kV
E)  −14 kVF) A) and E)
G) A) and B)

Question 11

A particle (charge = +2.0 mC) moving in a region where only electric forces act on it has a kinetic energy of 5.0 J at point A.The particle subsequently passes through point B which has an electric potential of +1.5 kV relative to point A.Determine the kinetic energy of the particle as it moves through point B.

Accepted Answer

A)  3.0 J
B)  2.0 J
C)  5.0 J
D)  8.0 J
E)  10.0 JF) B) and D)
G) A) and E)

Question 12

If a = 30 cm,b = 20 cm,q = +2.0 nC,and Q = −3.0 nC in the figure,what is the potential difference VA − VB? A − VB?   A) +60 V B) +72 V C) +84 V D) +96 V E) +48 V " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  +60 V
B)  +72 V
C)  +84 V
D)  +96 V
E)  +48 VF) A) and B)
G) A) and E)

Question 13

An electron (m = 9.1 × 10−31 kg,q = −1.6 × 10−19 C) starts from rest at point A and has a speed of 5.0 × 106 m/s at point B.Only electric forces act on it during this motion.Determine the electric potential difference VA − VB.

Accepted Answer

A)  −71 V
B)  +71 V
C)  −26 V
D)  +26 V
E)  −140 VF) A) and D)
G) B) and D) A

Question 14

Charge of uniform linear density 6.0 nC/m is distributed along the x axis from x = 0 to x = +3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point y = +4 m on the y axis?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and D)
G) D) and E)

Question 15

The electric potential inside a charged solid spherical conductor in equilibrium

Accepted Answer

A)  is always zero.
B)  is constant and equal to its value at the surface.
C)  decreases from its value at the surface to a value of zero at the center.
D)  increases from its value at the surface to a value at the center that is a multiple of the potential at the surface.
E)  is equal to the charge passing through the surface per unit time divided by the resistance.F) All of the above
G) None of the above

Question 16

When introduced into a region where an electric field is present,an electron with initial velocity 
Will eventually move

Accepted Answer

A)  along an electric field line,in the positive direction of the line.
B)  along an electric field line,in the negative direction of the line.
C)  to a point of decreased potential.
D)  to a point of increased potential.
E)  as described in both (b) and (d) .F) A) and E)
G) B) and E)

Question 17

Two particles,each having a mass of 3.0 μg and having equal but opposite charges of magnitude 5.0 nC,are released simultaneously from rest when the two are 5.0 cm apart.What is the speed of either particle at the instant when the two are separated by 2.0 cm?

Accepted Answer

A)  2.1 m/s
B)  1.5 m/s
C)  1.8 m/s
D)  2.4 m/s
E)  3.2 m/sF) D) and E)
G) B) and D) B

Question 18

A particle (charge = 50 μC) moves in a region where the only force on it is an electric force.As the particle moves 25 cm from point A to point B,its kinetic energy increases by 1.5 mJ.Determine the electric potential difference,VB − VA.

Accepted Answer

A)  −50 V
B)  −40 V
C)  −30 V
D)  −60 V
E)  +15 VF) A) and E)
G) B) and E)

Question 19

Which statement is always correct when applied to a charge distribution located in a finite region of space?

Accepted Answer

A)  Electric potential is always zero at infinity.
B)  Electric potential is always zero at the origin.
C)  Electric potential is always zero at a boundary surface to a charge distribution.
D)  Electric potential is always infinite at a boundary surface to a charge distribution.
E)  The location where electric potential is zero may be chosen arbitrarily.F) C) and D)
G) B) and D)

Question 20

A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC.What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?

Accepted Answer

A)  22 V
B)  19 V
C)  16 V
D)  25 V
E)  12 VF) A) and D)
G) B) and C)

Exam 25: Electric Potential

A particle (q = +5.0 μC) is released from rest when it is 2.0 m from a charged particle which is held at rest.After the positively charged particle has moved 1.0 m toward the fixed particle,it has a kinetic energy of 50 mJ.What is the charge on the fixed particle?

Correct Answer
verified

Charge of uniform linear density 3.0 nC/m is distributed along the x axis from x = 0 to x = 3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +4 m on the x axis?

Correct Answer
verified

A charge of 18 nC is uniformly distributed along the y axis from y = 3 m to y = 5 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +2 m on the x axis?

Correct Answer
verified

A charge is placed on a spherical conductor of radius r₁.This sphere is then connected to a distant sphere of radius r₂ (not equal to r₁) by a conducting wire.After the charges on the spheres are in equilibrium,

Correct Answer
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Correct Answer
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D

Correct Answer
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Two identical particles,each with a mass of 2.0 μg and a charge of 25 nC,are released simultaneously from rest when the two are 4.0 cm apart.What is the speed of either particle at the instant when the two are separated by 10 cm?

Correct Answer
verified

A system consisting of a negatively-charged particle and an electric field

Correct Answer
verified

The electric field in the region defined by the y-z plane and the negative x axis is given by E = −ax,where a is a constant.(There is no field for positive values of x. ) As −x increases in magnitude,relative to V = 0 at the origin,the electric potential in the region defined above is

Correct Answer
verified

Identical 4.0-μC charges are placed on the y axis at y = ±4.0 m.Point A is on the x axis at x = +3.0 m.Determine the electric potential of point A (relative to zero at the origin) .

Correct Answer
verified

Correct Answer
verified

If a = 30 cm,b = 20 cm,q = +2.0 nC,and Q = −3.0 nC in the figure,what is the potential difference V_A − V_B?

Correct Answer
verified

An electron (m = 9.1 × 10−³¹ kg,q = −1.6 × 10−¹⁹ C) starts from rest at point A and has a speed of 5.0 × 10⁶ m/s at point B.Only electric forces act on it during this motion.Determine the electric potential difference V_A − V_B.

Correct Answer
verified
A

Charge of uniform linear density 6.0 nC/m is distributed along the x axis from x = 0 to x = +3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point y = +4 m on the y axis?

Correct Answer
verified

The electric potential inside a charged solid spherical conductor in equilibrium

Correct Answer
verified

When introduced into a region where an electric field is present,an electron with initial velocity Will eventually move

Correct Answer
verified

Two particles,each having a mass of 3.0 μg and having equal but opposite charges of magnitude 5.0 nC,are released simultaneously from rest when the two are 5.0 cm apart.What is the speed of either particle at the instant when the two are separated by 2.0 cm?

Correct Answer
verified
B

A particle (charge = 50 μC) moves in a region where the only force on it is an electric force.As the particle moves 25 cm from point A to point B,its kinetic energy increases by 1.5 mJ.Determine the electric potential difference,V_B − V_A.

Correct Answer
verified

Which statement is always correct when applied to a charge distribution located in a finite region of space?

Correct Answer
verified

A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC.What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?

Correct Answer
verified

Exam 25: Electric Potential

A particle (q = +5.0 μC) is released from rest when it is 2.0 m from a charged particle which is held at rest.After the positively charged particle has moved 1.0 m toward the fixed particle,it has a kinetic energy of 50 mJ.What is the charge on the fixed particle?

Correct AnswerverifiedShow Answer

Charge of uniform linear density 3.0 nC/m is distributed along the x axis from x = 0 to x = 3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +4 m on the x axis?

Correct AnswerverifiedShow Answer

A charge of 18 nC is uniformly distributed along the y axis from y = 3 m to y = 5 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point x = +2 m on the x axis?

Correct AnswerverifiedShow Answer

A charge is placed on a spherical conductor of radius r1.This sphere is then connected to a distant sphere of radius r2 (not equal to r1) by a conducting wire.After the charges on the spheres are in equilibrium,

Correct AnswerverifiedShow Answer

Correct AnswerverifiedD

Correct AnswerverifiedShow Answer

Two identical particles,each with a mass of 2.0 μg and a charge of 25 nC,are released simultaneously from rest when the two are 4.0 cm apart.What is the speed of either particle at the instant when the two are separated by 10 cm?

Correct AnswerverifiedShow Answer

A system consisting of a negatively-charged particle and an electric field

Correct AnswerverifiedShow Answer

The electric field in the region defined by the y-z plane and the negative x axis is given by E = −ax,where a is a constant.(There is no field for positive values of x. ) As −x increases in magnitude,relative to V = 0 at the origin,the electric potential in the region defined above is

Correct AnswerverifiedShow Answer

Identical 4.0-μC charges are placed on the y axis at y = ±4.0 m.Point A is on the x axis at x = +3.0 m.Determine the electric potential of point A (relative to zero at the origin) .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If a = 30 cm,b = 20 cm,q = +2.0 nC,and Q = −3.0 nC in the figure,what is the potential difference VA − VB?

Correct AnswerverifiedShow Answer

An electron (m = 9.1 × 10−31 kg,q = −1.6 × 10−19 C) starts from rest at point A and has a speed of 5.0 × 106 m/s at point B.Only electric forces act on it during this motion.Determine the electric potential difference VA − VB.

Correct AnswerverifiedA

Charge of uniform linear density 6.0 nC/m is distributed along the x axis from x = 0 to x = +3 m.Which of the following integrals is correct for the electric potential (relative to zero at infinity) at the point y = +4 m on the y axis?

Correct AnswerverifiedShow Answer

The electric potential inside a charged solid spherical conductor in equilibrium

Correct AnswerverifiedShow Answer

When introduced into a region where an electric field is present,an electron with initial velocity Will eventually move

Correct AnswerverifiedShow Answer

Two particles,each having a mass of 3.0 μg and having equal but opposite charges of magnitude 5.0 nC,are released simultaneously from rest when the two are 5.0 cm apart.What is the speed of either particle at the instant when the two are separated by 2.0 cm?

Correct AnswerverifiedB

A particle (charge = 50 μC) moves in a region where the only force on it is an electric force.As the particle moves 25 cm from point A to point B,its kinetic energy increases by 1.5 mJ.Determine the electric potential difference,VB − VA.

Correct AnswerverifiedShow Answer

Which statement is always correct when applied to a charge distribution located in a finite region of space?

Correct AnswerverifiedShow Answer

A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC.What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?

Correct AnswerverifiedShow Answer

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Correct Answer
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A charge is placed on a spherical conductor of radius r₁.This sphere is then connected to a distant sphere of radius r₂ (not equal to r₁) by a conducting wire.After the charges on the spheres are in equilibrium,

Correct Answer
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Correct Answer
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D

Correct Answer
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Correct Answer
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Correct Answer
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If a = 30 cm,b = 20 cm,q = +2.0 nC,and Q = −3.0 nC in the figure,what is the potential difference V_A − V_B?

Correct Answer
verified

An electron (m = 9.1 × 10−³¹ kg,q = −1.6 × 10−¹⁹ C) starts from rest at point A and has a speed of 5.0 × 10⁶ m/s at point B.Only electric forces act on it during this motion.Determine the electric potential difference V_A − V_B.

Correct Answer
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A

Correct Answer
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Correct Answer
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B

A particle (charge = 50 μC) moves in a region where the only force on it is an electric force.As the particle moves 25 cm from point A to point B,its kinetic energy increases by 1.5 mJ.Determine the electric potential difference,V_B − V_A.

Correct Answer
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Correct Answer
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Correct Answer
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