Question 1

An infinite plane of charge has a uniform planar charge density and is located in the yz plane at x=0.A fixed point charge placed on the x-axis at x = + 1.0 m and the electric potential is a minimum on the x-axis at x=+0.31 m.What is the planar charge density on the plane?

Accepted Answer

A)  + 1.1 nC/m2
B)  + 0.91 nC/m2
C)  + 1.7 nC/m2
D)  + 2.2 nC/m2
E)  + 3.5 nC/m2

Question 2

The period of motion of a proton (mass: 1.67 * 10-27 kg) in a one-dimensional electrical potential (17 mV/m2) x2 executes simple harmonic motion with what frequency?

Accepted Answer

A)  200 Hz
B)  290 Hz
C)  1276 Hz
D)  1830 Hz
E)  Not enough information is given.

Question 3

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

Accepted Answer

A)  5
B)  23
C)  29
D)  59
E)  131

Question 4

When two charges are separated by a distance d,their electric potential energy is equal to U.What would be their electric potential energy if the separation distance was d/2?

Accepted Answer

A)  U/4
B)  U/2
C)  2U
D)  4U

Question 5

Two isolated spheres have the same electric potential at their surface,but sphere A has twice the radius of sphere B.How is the charge on sphere A related to the charge on sphere B?

Accepted Answer

A)  QA = QB
B)  QA = 2QB
C)  2QA = QB
D)  QA = 4QB

Question 6

A positive point charge q1 = 3.70  μ\muμ C is located at the origin (x=0,y=0) .The charge is held fixed.Another point charge q2 = 6.90  μ\muμ C starts at the point (0.170 m,0) .What is the magnitude of the work required to move q2 to (0,0.370 m) (in J) ? 1 = 3.70  \mu C is located at the origin (x=0,y=0) .The charge is held fixed.Another point charge q2 = 6.90  \mu C starts at the point (0.170 m,0) .What is the magnitude of the work required to move q2 to (0,0.370 m) (in J) ?   A) 0.730 B) 0.912 C) 1.140 D) 1.425 E) 1.782  " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0.730
B)  0.912
C)  1.140
D)  1.425
E)  1.782

Question 7

An electron is placed in an electric field and is allowed to accelerate for a distance of 1 m.If the strength of the electric field is E = 200 V/m then what is the final velocity of the electron,assuming it starts from rest?

Accepted Answer

A)  3.5 * 108 m/s
B)  1.2 * 104 m/s
C)  7.2 * 102 m/s
D)  4.1 * 103 m/s
E)  8.4 * 106 m/s

Question 8

What is the magnitude of the electric potential at point P (in V) at a distance R = 3.50 m from a point charge Q of magnitude 4.00  μ\muμ C?

Accepted Answer

A)  10,274
B)  14,898
C)  21,602
D)  31,322
E)  45,418  A

Question 9

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

Accepted Answer

A)  78 V/m
B)  100 V/m
C)  92 V/m
D)  81 V/m
E)  56 V/m

Question 10

An electric potential is given by V=4x2 + 2y2 + x + z + 2 volts.What is the electric field at the point (2,2,2) ?

Accepted Answer

A)  -2i - 3j N/C
B)  -17i - 8j + k N/C
C)  -16i - 4j + k N/C
D)  -10i - 5j - 2k N/C
E)  -3i - 8j N/C

Question 11

Consider two isolated metal spheres,the first with a charge of 8.7  and a radius of 25 cm and the second uncharged with a radius of 5.4 cm.What is the charge on the smaller sphere after a long thin metal wire is used to connect the two spheres?

Accepted Answer

A)  0 
B)  1.5 
C)  4.4 
D)  7.2 
E)  8.7

Question 12

A point charge of 5 µC is moved against a potential difference of + 20 V.What is the work done by the force moving the charge?

Accepted Answer

A)  100 µJ
B)  25 µJ
C)  5 µJ
D)  4 µJ
E)  0.1 µJ

Question 13

In an effort to produce nuclear fusion you fire a deuterium nuclei (q = + 1e,m = 3.34 * 10-27kg) directly at another (fixed) hydrogen nucleus.How fast must you fire the deuterium for it to approach within 2.0 * 10-15 m of the nuclei?

Accepted Answer

A)  8.3 * 106 m/s
B)  5.4 * 107 m/s
C)  1.4 * 108 m/s
D)  1.9 * 1014 m/s
E)  2.1 * 1016 m/s A

Question 14

Two parallel plates are held at a potential of + 220 V and + 130 V.If the plates have area of 44 cm2 and are separated by a distance of 7.3 mm,what is the magnitude of the electric field between the plates?

Accepted Answer

A)  54 V/m
B)  132 N/C
C)  12,000 N/C
D)  20 kV/m
E)  30,000 N/C

Question 15

A 250-g metal ball with a charge of 0.50 mC has a kinetic energy of 6.0 * 108 J.It is traveling directly at an infinite plane of charge with a charge density of 33 C/m2.If it is currently 2.0 m away from the plane of charge,how close will it come to the plane before stopping?

Accepted Answer

A)  0.32 m
B)  0.64 m
C)  1.36 m
D)  1.68 m
E)  It will hit the charged plane.

Question 16

The potential energy stored in a system consisting of an electric dipole in a constant electric field is zero when the angle between the electric dipole moment and the electric field is:

Accepted Answer

A)  0 ∘\circ∘ 
B)  90 ∘\circ∘ 
C)  180 ∘\circ∘ 
D)  the potential energy is independent of the angle between these two vectors

Question 17

Four identical point charges (+ 2.50 nC) are placed at the corners of a rectangle which measures 2.00 m * 4.00 m.If the electric potential is taken to be zero at infinity,what is the potential at the geometric center of this rectangle?

Accepted Answer

A)  8.99 V
B)  19.9 V
C)  20.1 V
D)  30.0 V
E)  40.2 V

Question 18

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.What fixed point charge should be placed on the x-axis at x = + 1.0 m to make the electric potential a minimum on the x-axis at x=+0.65 m?

Accepted Answer

A)  + 5.0 nC
B)  + 7.8 nC
C)  + 3.3 nC
D)  + 1.7 nC
E)  + 4.4 nC

Question 19

At a distance d from a charge,the electric potential is V.What would be the electric potential a distance d/2 from the same charge?

Accepted Answer

A)  V/4
B)  V/2
C)  2V
D)  4V C

Question 20

An insulating sheet in the xz-plane is uniformly charged with charge surface density   σ\sigmaσ  = 6.2 * 10-6 C/m2.What is the change in electric potential when a charge of Q=3.3  μ\muμ C is moved from a position that is 6.2 m away from the sheet to a position that is 1.3 m away from the sheet?

Accepted Answer

A)  1.7 * 106 V
B)  -1.7 * 106 V
C)  3.4 * 106 V
D)  -3.4 * 106 V
E)  9.1 * 105 V

Exam 23: Electric Potential

An infinite plane of charge has a uniform planar charge density and is located in the yz plane at x=0.A fixed point charge placed on the x-axis at x = + 1.0 m and the electric potential is a minimum on the x-axis at x=+0.31 m.What is the planar charge density on the plane?

Correct Answer
verified

The period of motion of a proton (mass: 1.67 * 10^-27 kg) in a one-dimensional electrical potential (17 mV/m²) x² executes simple harmonic motion with what frequency?

Correct Answer
verified

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

Correct Answer
verified

When two charges are separated by a distance d,their electric potential energy is equal to U.What would be their electric potential energy if the separation distance was d/2?

Correct Answer
verified

Two isolated spheres have the same electric potential at their surface,but sphere A has twice the radius of sphere B.How is the charge on sphere A related to the charge on sphere B?

Correct Answer
verified

Correct Answer
verified

An electron is placed in an electric field and is allowed to accelerate for a distance of 1 m.If the strength of the electric field is E = 200 V/m then what is the final velocity of the electron,assuming it starts from rest?

Correct Answer
verified

Correct Answer
verified
A

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

Correct Answer
verified

An electric potential is given by V=4x² + 2y² + x + z + 2 volts.What is the electric field at the point (2,2,2) ?

Correct Answer
verified

Consider two isolated metal spheres,the first with a charge of 8.7 and a radius of 25 cm and the second uncharged with a radius of 5.4 cm.What is the charge on the smaller sphere after a long thin metal wire is used to connect the two spheres?

Correct Answer
verified

A point charge of 5 µC is moved against a potential difference of + 20 V.What is the work done by the force moving the charge?

Correct Answer
verified

In an effort to produce nuclear fusion you fire a deuterium nuclei (q = + 1e,m = 3.34 * 10^-27kg) directly at another (fixed) hydrogen nucleus.How fast must you fire the deuterium for it to approach within 2.0 * 10^-15 m of the nuclei?

Correct Answer
verified
A

Two parallel plates are held at a potential of + 220 V and + 130 V.If the plates have area of 44 cm² and are separated by a distance of 7.3 mm,what is the magnitude of the electric field between the plates?

Correct Answer
verified

A 250-g metal ball with a charge of 0.50 mC has a kinetic energy of 6.0 * 10⁸ J.It is traveling directly at an infinite plane of charge with a charge density of 33 C/m².If it is currently 2.0 m away from the plane of charge,how close will it come to the plane before stopping?

Correct Answer
verified

The potential energy stored in a system consisting of an electric dipole in a constant electric field is zero when the angle between the electric dipole moment and the electric field is:

Correct Answer
verified

Four identical point charges (+ 2.50 nC) are placed at the corners of a rectangle which measures 2.00 m * 4.00 m.If the electric potential is taken to be zero at infinity,what is the potential at the geometric center of this rectangle?

Correct Answer
verified

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.What fixed point charge should be placed on the x-axis at x = + 1.0 m to make the electric potential a minimum on the x-axis at x=+0.65 m?

Correct Answer
verified

At a distance d from a charge,the electric potential is V.What would be the electric potential a distance d/2 from the same charge?

Correct Answer
verified
C

An insulating sheet in the xz-plane is uniformly charged with charge surface density $\sigma$ = 6.2 * 10^-6 C/m².What is the change in electric potential when a charge of Q=3.3 $\mu$ C is moved from a position that is 6.2 m away from the sheet to a position that is 1.3 m away from the sheet?

Correct Answer
verified

Exam 23: Electric Potential

An infinite plane of charge has a uniform planar charge density and is located in the yz plane at x=0.A fixed point charge placed on the x-axis at x = + 1.0 m and the electric potential is a minimum on the x-axis at x=+0.31 m.What is the planar charge density on the plane?

Correct AnswerverifiedShow Answer

The period of motion of a proton (mass: 1.67 * 10-27 kg) in a one-dimensional electrical potential (17 mV/m2) x2 executes simple harmonic motion with what frequency?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When two charges are separated by a distance d,their electric potential energy is equal to U.What would be their electric potential energy if the separation distance was d/2?

Correct AnswerverifiedShow Answer

Two isolated spheres have the same electric potential at their surface,but sphere A has twice the radius of sphere B.How is the charge on sphere A related to the charge on sphere B?

Correct AnswerverifiedShow Answer

A positive point charge q1 = 3.70 μ\muμ C is located at the origin (x=0,y=0) .The charge is held fixed.Another point charge q2 = 6.90 μ\muμ C starts at the point (0.170 m,0) .What is the magnitude of the work required to move q2 to (0,0.370 m) (in J) ?

Correct AnswerverifiedShow Answer

An electron is placed in an electric field and is allowed to accelerate for a distance of 1 m.If the strength of the electric field is E = 200 V/m then what is the final velocity of the electron,assuming it starts from rest?

Correct AnswerverifiedShow Answer

What is the magnitude of the electric potential at point P (in V) at a distance R = 3.50 m from a point charge Q of magnitude 4.00 μ\muμ C?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

An electric potential is given by V=4x2 + 2y2 + x + z + 2 volts.What is the electric field at the point (2,2,2) ?

Correct AnswerverifiedShow Answer

Consider two isolated metal spheres,the first with a charge of 8.7 and a radius of 25 cm and the second uncharged with a radius of 5.4 cm.What is the charge on the smaller sphere after a long thin metal wire is used to connect the two spheres?

Correct AnswerverifiedShow Answer

A point charge of 5 µC is moved against a potential difference of + 20 V.What is the work done by the force moving the charge?

Correct AnswerverifiedShow Answer

In an effort to produce nuclear fusion you fire a deuterium nuclei (q = + 1e,m = 3.34 * 10-27kg) directly at another (fixed) hydrogen nucleus.How fast must you fire the deuterium for it to approach within 2.0 * 10-15 m of the nuclei?

Correct AnswerverifiedA

Two parallel plates are held at a potential of + 220 V and + 130 V.If the plates have area of 44 cm2 and are separated by a distance of 7.3 mm,what is the magnitude of the electric field between the plates?

Correct AnswerverifiedShow Answer

A 250-g metal ball with a charge of 0.50 mC has a kinetic energy of 6.0 * 108 J.It is traveling directly at an infinite plane of charge with a charge density of 33 C/m2.If it is currently 2.0 m away from the plane of charge,how close will it come to the plane before stopping?

Correct AnswerverifiedShow Answer

The potential energy stored in a system consisting of an electric dipole in a constant electric field is zero when the angle between the electric dipole moment and the electric field is:

Correct AnswerverifiedShow Answer

Four identical point charges (+ 2.50 nC) are placed at the corners of a rectangle which measures 2.00 m * 4.00 m.If the electric potential is taken to be zero at infinity,what is the potential at the geometric center of this rectangle?

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.What fixed point charge should be placed on the x-axis at x = + 1.0 m to make the electric potential a minimum on the x-axis at x=+0.65 m?

Correct AnswerverifiedShow Answer

At a distance d from a charge,the electric potential is V.What would be the electric potential a distance d/2 from the same charge?

Correct AnswerverifiedC

An insulating sheet in the xz-plane is uniformly charged with charge surface density σ\sigmaσ = 6.2 * 10-6 C/m2.What is the change in electric potential when a charge of Q=3.3 μ\muμ C is moved from a position that is 6.2 m away from the sheet to a position that is 1.3 m away from the sheet?

Correct AnswerverifiedShow Answer

Correct Answer
verified

The period of motion of a proton (mass: 1.67 * 10^-27 kg) in a one-dimensional electrical potential (17 mV/m²) x² executes simple harmonic motion with what frequency?

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

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

Correct Answer
verified

An electric potential is given by V=4x² + 2y² + x + z + 2 volts.What is the electric field at the point (2,2,2) ?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In an effort to produce nuclear fusion you fire a deuterium nuclei (q = + 1e,m = 3.34 * 10^-27kg) directly at another (fixed) hydrogen nucleus.How fast must you fire the deuterium for it to approach within 2.0 * 10^-15 m of the nuclei?

Correct Answer
verified
A

Two parallel plates are held at a potential of + 220 V and + 130 V.If the plates have area of 44 cm² and are separated by a distance of 7.3 mm,what is the magnitude of the electric field between the plates?

Correct Answer
verified

A 250-g metal ball with a charge of 0.50 mC has a kinetic energy of 6.0 * 10⁸ J.It is traveling directly at an infinite plane of charge with a charge density of 33 C/m².If it is currently 2.0 m away from the plane of charge,how close will it come to the plane before stopping?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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.What fixed point charge should be placed on the x-axis at x = + 1.0 m to make the electric potential a minimum on the x-axis at x=+0.65 m?

Correct Answer
verified

Correct Answer
verified
C

An insulating sheet in the xz-plane is uniformly charged with charge surface density $\sigma$ = 6.2 * 10^-6 C/m².What is the change in electric potential when a charge of Q=3.3 $\mu$ C is moved from a position that is 6.2 m away from the sheet to a position that is 1.3 m away from the sheet?

Correct Answer
verified