Question 1

When 2.0 C of charge moves at constant speed along a path between two points differing in potential by 6.0 V,the amount of work done is

Accepted Answer

A)  2 J
B)  3 J
C)  6 J
D)  12 J
E)  24 JF) C) and D)
G) None of the above

Question 2

An electric charge q is placed on an isolated metal sphere of radius r1.If an uncharged sphere of radius r2 (with r2 > r1) is then connected to the first sphere,the spheres will have equal

Accepted Answer

A)  and like charges on their surfaces.
B)  electric fields.
C)  potentials.
D)  capacitances.
E)  but opposite charges on their surfaces.F) All of the above
G) B) and C)

Question 3

A solid spherical conductor of radius 20 cm has a charge Q = 25 nC on it.A second,initially uncharged,spherical conductor of radius 12 cm is moved toward the first until they touch and is then moved far away from it.How much charge is there on the second sphere after the two spheres have been separated?

Accepted Answer

A)  15 nC
B)  9.4 nC
C)  25 nC
D)  3.9 nC
E)  2.1 nCF) A) and B)
G) A) and C)

Question 4

Which of the following statements regarding potential is true?

Accepted Answer

A)  The units of potential are N/C.
B)  Potential is a vector quantity.
C)  Equipotential surfaces are at right angles to lines of force.
D)  Potential differences can be measured directly with a ballistic galvanometer.
E)  Equipotential surfaces for an isolated point charge are cubes concentric with the charge.F) B) and E)
G) C) and E)

Question 5

Use the following to answer the next question. 
-The electrostatic potential energy of a positively charged body is greatest at point _____.

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and B)
G) None of the above

Question 6

Two protons in a nucleus of 238U are 6.0  10-15 m apart.The electrostatic potential energy of the pair is approximately

Accepted Answer

A)  zero
B)  4.7  10-34 J
C)  4.3  10-24 J
D)  3.8  10-14 J
E)  2.4  104 JF) C) and D)
G) A) and D)

Question 7

Use the following figure to answer the next  problem: e,from the 100 V line to b is A) 100 eV B) 100 eV C) 200 eV D) 200 eV E) zero" class="answers-bank-image d-inline" rel="preload" > Two equal positive charges are placed x m apart.The equipotential lines are at 100 V interval.
-The work required to move a third charge,q = e,from the 100 V line to b is

Accepted Answer

A)  100 eV
B)  100 eV
C)  200 eV
D)  200 eV
E)  zeroF) D) and E)
G) B) and D)

Question 8

Use the following to answer the next question. 
-The electrostatic potential energy of a negatively charged body is greatest at point _____.

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) All of the above
G) B) and C)

Question 9

Dielectric breakdown occurs in the air at an electric field strength of Emax = 3.0  106 V/m.If the maximum potential at the surface of a spherical conductor is 5.0  106 V,then calculate the radius of the sphere.

Accepted Answer

A)  0.60 m
B)  1.3 m
C)  1.7 m
D)  0.77 m
E)  15 mF) A) and E)
G) B) and C)

Question 10

An electric dipole that has a positive charge of 4.8 × 10-19 C is separated from a negative charge of the same magnitude by 6.4 × 10-10 m.The electric potential at a point 9.2 × 10-10 m from each of the two charges is

Accepted Answer

A)  9.4 V
B)  zero
C)  4.2 V
D)  5.1 × 109 V
E)  1.7 VF) A) and B)
G) C) and D)

Question 11

A solid spherical conductor of radius 15 cm has a charge Q = 6.5 nC on it.A second,initially uncharged,spherical conductor of radius 10 cm is moved toward the first until they touch and is then moved far away from it.How much charge is there on the second sphere after the two spheres have been separated?

Accepted Answer

A)  2.6 nC
B)  2.2 nC
C)  3.2 nC
D)  3.9 nC
E)  4.3 nCF) B) and D)
G) A) and C)

Question 12

The potential of a spherical shell carrying 6.0 C of charge is 540 kV.What is the radius of the shell?

Accepted Answer

A)  1.0  101 m
B)  1.0  102 m
C)  3.2  10-1 m
D)  1.0  10-1 m
E)  none of the aboveF) C) and D)
G) A) and E)

Question 13

The metal sphere at the top of a small Van de Graaf generator has a radius of 8.0 cm.How much charge can be accumulated on this sphere before dielectric breakdown of the air around it occurs? (The dielectric strength of air is 3.0 MV/m.)

Accepted Answer

A)  2.1 µC
B)  3.3 µC
C)  1.3 nC
D)  6.7 µC
E)  4.2 µCF) A) and B)
G) A) and E)

Question 14

A proton (charge = e,mass = 1.67  10-27 kg) with initial kinetic energy 3 MeV is fired head-on towards a fixed stationary uranium nucleus (charge 92e,mass = 3.95  10-25 kg) .Calculate how close to the uranium the proton gets before it comes to rest.(Assume the uranium nucleus does not move.)

Accepted Answer

A)  2.75  105 m
B)  4.40  10-8 m
C)  4.40  10-14 m
D)  2.10  10-7 m
E)  none of the aboveF) B) and D)
G) C) and E)

Question 15

The charge density of an infinite line of charge is  = 100 nC/m.If zero of potential is chosen to be at a point having a perpendicular distance of 1 m from the line,the electric potential at a perpendicular distance of 50 cm from this line is

Accepted Answer

A)  1.25 kV
B)  2.34 kV
C)  0
D)  -1.25 kV
E)  -2.34 kVF) A) and B)
G) A) and D)

Question 16

Use the following figure to answer the next problem: e from infinity to r = 2 m is A) 4000 eV B) 2000 eV C) 1000 eV D)    4000 eV E) zero" class="answers-bank-image d-inline" rel="preload" > The electric field versus distance for a charge is plotted above.Use the reference point
e from infinity to r = 2 m is A) 4000 eV B) 2000 eV C) 1000 eV D)    4000 eV E) zero" class="answers-bank-image d-inline" rel="preload" >
-The work required to move a charge,q = e from infinity to r = 2 m is

Accepted Answer

A)  4000 eV
B)  2000 eV
C)  1000 eV
D)   e from infinity to r = 2 m is 
A)  4000 eV 
B)  2000 eV 
C)  1000 eV 
D)     4000 eV 
E)  zero" class="answers-bank-image d-inline" rel="preload" > 4000 eV
E)  zeroF) A) and E)
G) All of the above

Question 17

The electric potential in a region of space is given by  The y-component of the electric field in this region is

Accepted Answer

A)  (10 V/m)  
B)  -(10 V/m)  
C)  -(20 V/m)  
D)  (20 V/m)  
E)  -(30 V/m)  F) A) and B)
G) C) and E)

Question 18

The electric potential is known to be a function of x only; i.e.,v = V(x) .The electric field at a position x1 is given by

Accepted Answer

A)  V(x1) 
B)   1 is given by 
A)  V(x1)  
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   1 is given by 
A)  V(x1)  
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   1 is given by 
A)  V(x1)  
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   1 is given by 
A)  V(x1)  
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and E)
G) B) and C)

Question 19

Three charges are brought from infinity and placed at the corner of an equilateral triangle.Which of the following statements is true?

Accepted Answer

A)  The work required to assemble the charges is always positive.
B)  The electrostatic potential energy of the system is always positive.
C)  The electrostatic potential energy does not depend on the order the charges are placed at the corners.
D)  The work required to assemble the charges depends on which charge is placed at which corner.
E)  The electrostatic potential energy depends on which charge is placed at which corner.F) A) and D)
G) A) and C)

Question 20

The electric potential in a region of space is given by V = 2xy + 3y2 in units of V.The electric field,in V/m,in this region is

Accepted Answer

A)   2 in units of V.The electric field,in V/m,in this region is 
A)     
B)     
C)     
D)     
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >
B)   2 in units of V.The electric field,in V/m,in this region is 
A)     
B)     
C)     
D)     
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >
C)   2 in units of V.The electric field,in V/m,in this region is 
A)     
B)     
C)     
D)     
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >
D)   2 in units of V.The electric field,in V/m,in this region is 
A)     
B)     
C)     
D)     
E)  none of the above" class="answers-bank-image d-inline" rel="preload" >
E)  none of the aboveF) B) and E)
G) A) and B)

Exam 23: Electric Potential

Three charges are brought from infinity and placed at the corner of an equilateral triangle.Which of the following statements is true?

Correct Answer
verified

Use the following to answer the next question. -The electrostatic potential energy of a positively charged body is greatest at point _____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An electric dipole that has a positive charge of 4.8 × 10^-¹⁹ C is separated from a negative charge of the same magnitude by 6.4 × 10^-¹⁰ m.The electric potential at a point 9.2 × 10^-¹⁰ m from each of the two charges is

Correct Answer
verified

The potential of a spherical shell carrying 6.0 C of charge is 540 kV.What is the radius of the shell?

Correct Answer
verified

Which of the following statements regarding potential is true?

Correct Answer
verified

The electric potential is known to be a function of x only; i.e.,v = V(x) .The electric field at a position x₁ is given by

Correct Answer
verified

Use the following figure to answer the next problem: Two equal positive charges are placed x m apart.The equipotential lines are at 100 V interval. -The work required to move a third charge,q = e,from the 100 V line to b is

Correct Answer
verified

An electric charge q is placed on an isolated metal sphere of radius r₁.If an uncharged sphere of radius r₂ (with r₂ > r₁) is then connected to the first sphere,the spheres will have equal

Correct Answer
verified

When 2.0 C of charge moves at constant speed along a path between two points differing in potential by 6.0 V,the amount of work done is

Correct Answer
verified

Use the following to answer the next question. -The electrostatic potential energy of a negatively charged body is greatest at point _____.

Correct Answer
verified

Use the following figure to answer the next problem: The electric field versus distance for a charge is plotted above.Use the reference point -The work required to move a charge,q = e from infinity to r = 2 m is

Correct Answer
verified

The metal sphere at the top of a small Van de Graaf generator has a radius of 8.0 cm.How much charge can be accumulated on this sphere before dielectric breakdown of the air around it occurs? (The dielectric strength of air is 3.0 MV/m.)

Correct Answer
verified

The electric potential in a region of space is given by The y-component of the electric field in this region is

Correct Answer
verified

A proton (charge = e,mass = 1.67  10^-27 kg) with initial kinetic energy 3 MeV is fired head-on towards a fixed stationary uranium nucleus (charge 92e,mass = 3.95  10^-25 kg) .Calculate how close to the uranium the proton gets before it comes to rest.(Assume the uranium nucleus does not move.)

Correct Answer
verified

Two protons in a nucleus of ²³⁸U are 6.0  10^-15 m apart.The electrostatic potential energy of the pair is approximately

Correct Answer
verified

The charge density of an infinite line of charge is  = 100 nC/m.If zero of potential is chosen to be at a point having a perpendicular distance of 1 m from the line,the electric potential at a perpendicular distance of 50 cm from this line is

Correct Answer
verified

The electric potential in a region of space is given by V = 2xy + 3y² in units of V.The electric field,in V/m,in this region is

Correct Answer
verified

Dielectric breakdown occurs in the air at an electric field strength of E_max = 3.0  10⁶ V/m.If the maximum potential at the surface of a spherical conductor is 5.0  10⁶ V,then calculate the radius of the sphere.

Correct Answer
verified

Exam 23: Electric Potential

Three charges are brought from infinity and placed at the corner of an equilateral triangle.Which of the following statements is true?

Correct AnswerverifiedShow Answer

Use the following to answer the next question. -The electrostatic potential energy of a positively charged body is greatest at point _____.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

An electric dipole that has a positive charge of 4.8 × 10-19 C is separated from a negative charge of the same magnitude by 6.4 × 10-10 m.The electric potential at a point 9.2 × 10-10 m from each of the two charges is

Correct AnswerverifiedShow Answer

The potential of a spherical shell carrying 6.0 C of charge is 540 kV.What is the radius of the shell?

Correct AnswerverifiedShow Answer

Which of the following statements regarding potential is true?

Correct AnswerverifiedShow Answer

The electric potential is known to be a function of x only; i.e.,v = V(x) .The electric field at a position x1 is given by

Correct AnswerverifiedShow Answer

Use the following figure to answer the next problem: Two equal positive charges are placed x m apart.The equipotential lines are at 100 V interval. -The work required to move a third charge,q = e,from the 100 V line to b is

Correct AnswerverifiedShow Answer

An electric charge q is placed on an isolated metal sphere of radius r1.If an uncharged sphere of radius r2 (with r2 > r1) is then connected to the first sphere,the spheres will have equal

Correct AnswerverifiedShow Answer

When 2.0 C of charge moves at constant speed along a path between two points differing in potential by 6.0 V,the amount of work done is

Correct AnswerverifiedShow Answer

Use the following to answer the next question. -The electrostatic potential energy of a negatively charged body is greatest at point _____.

Correct AnswerverifiedShow Answer

Use the following figure to answer the next problem: The electric field versus distance for a charge is plotted above.Use the reference point -The work required to move a charge,q = e from infinity to r = 2 m is

Correct AnswerverifiedShow Answer

The metal sphere at the top of a small Van de Graaf generator has a radius of 8.0 cm.How much charge can be accumulated on this sphere before dielectric breakdown of the air around it occurs? (The dielectric strength of air is 3.0 MV/m.)

Correct AnswerverifiedShow Answer

The electric potential in a region of space is given by The y-component of the electric field in this region is

Correct AnswerverifiedShow Answer

A proton (charge = e,mass = 1.67  10-27 kg) with initial kinetic energy 3 MeV is fired head-on towards a fixed stationary uranium nucleus (charge 92e,mass = 3.95  10-25 kg) .Calculate how close to the uranium the proton gets before it comes to rest.(Assume the uranium nucleus does not move.)

Correct AnswerverifiedShow Answer

Two protons in a nucleus of 238U are 6.0  10-15 m apart.The electrostatic potential energy of the pair is approximately

Correct AnswerverifiedShow Answer

The charge density of an infinite line of charge is  = 100 nC/m.If zero of potential is chosen to be at a point having a perpendicular distance of 1 m from the line,the electric potential at a perpendicular distance of 50 cm from this line is

Correct AnswerverifiedShow Answer

The electric potential in a region of space is given by V = 2xy + 3y2 in units of V.The electric field,in V/m,in this region is

Correct AnswerverifiedShow Answer

Dielectric breakdown occurs in the air at an electric field strength of Emax = 3.0  106 V/m.If the maximum potential at the surface of a spherical conductor is 5.0  106 V,then calculate the radius of the sphere.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An electric dipole that has a positive charge of 4.8 × 10^-¹⁹ C is separated from a negative charge of the same magnitude by 6.4 × 10^-¹⁰ m.The electric potential at a point 9.2 × 10^-¹⁰ m from each of the two charges is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The electric potential is known to be a function of x only; i.e.,v = V(x) .The electric field at a position x₁ is given by

Correct Answer
verified

Correct Answer
verified

An electric charge q is placed on an isolated metal sphere of radius r₁.If an uncharged sphere of radius r₂ (with r₂ > r₁) is then connected to the first sphere,the spheres will have equal

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Two protons in a nucleus of ²³⁸U are 6.0  10^-15 m apart.The electrostatic potential energy of the pair is approximately

Correct Answer
verified

Correct Answer
verified

The electric potential in a region of space is given by V = 2xy + 3y² in units of V.The electric field,in V/m,in this region is

Correct Answer
verified

Dielectric breakdown occurs in the air at an electric field strength of E_max = 3.0  10⁶ V/m.If the maximum potential at the surface of a spherical conductor is 5.0  10⁶ V,then calculate the radius of the sphere.

Correct Answer
verified