Question 1

Two equal positive charges are held in place at a fixed distance.If you put a third positive charge midway between these two charges,its electrical potential energy of the system (relative to infinity)is zero because the electrical forces on the third charge due to the two fixed charges just balance each other.

Accepted Answer

A) True 
 B)False

Question 2

If the electric field is zero everywhere inside a region of space,the potential must also be zero in that region.

Accepted Answer

A) True 
 B)False

Question 3

An alpha particle is a nucleus of helium.It has twice the charge and four times the mass of the proton.When they were very far away from each other,but headed toward directly each other,a proton and an alpha particle each had an initial speed of 0.0030c,where c is the speed of light.What is their distance of closest approach? Hint: There are two conserved quantities.Make use of both of them.(c = 3.00 × 108 m/s,k = 1/4πε0 = 8 m/s,k = 1/4πε0 =   ,   ,   A)  2.1 × 10-13 m B)  3.3 × 10-13 m C)  2.6 × 10-13 m D)  2.9 × 10-13 m" class="answers-bank-image d-inline" rel="preload" > , 8 m/s,k = 1/4πε0 =   ,   ,   A)  2.1 × 10-13 m B)  3.3 × 10-13 m C)  2.6 × 10-13 m D)  2.9 × 10-13 m" class="answers-bank-image d-inline" rel="preload" > , 8 m/s,k = 1/4πε0 =   ,   ,   A)  2.1 × 10-13 m B)  3.3 × 10-13 m C)  2.6 × 10-13 m D)  2.9 × 10-13 m" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   2.1 × 10-13 m
B)   3.3 × 10-13 m
C)   2.6 × 10-13 m
D)   2.9 × 10-13 mE) B) and C)
F) All of the above

Question 4

A -3.0-μC point charge and a -9.0-μC point charge are initially extremely far apart.How much work does it take to bring the -3.0-μC charge to  ,  and the  to  ,  ?

Accepted Answer

A)   40 J
B)   81 J
C)   27 J
D)   6.8 JE) B) and D)
F) A) and D)

Question 5

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm.The electric potential of the inner conductor,with respect to the outer conductor,is +600 V.What is the maximum electric field magnitude between the cylinders?  =

Accepted Answer

A)   10,000 V/m
B)   14,000 V/m
C)   18,000 V/m
D)   22,000 V/m
E)   26,000 V/mF) A) and C)
G) None of the above

Question 6

A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC,and no other charges are present.(k = 1/4πε0 = 0 =   The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to A)  zero. B)  674 kV. C)  1130 kV. D)  3380 kV. E)  9380 kV." class="answers-bank-image d-inline" rel="preload" > The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to

Accepted Answer

A)   zero.
B)   674 kV.
C)   1130 kV.
D)   3380 kV.
E)   9380 kV.F) B) and E)
G) A) and C)

Question 7

A sphere with radius 2.0 mm carries +1.0 μC of charge distributed uniformly throughout its volume.What is the potential difference,VB - VA,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere? B - VA,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere?   =   A)  1200 V B)  -1200 V C)  140 V D)  -0.45 V" class="answers-bank-image d-inline" rel="preload" > = B - VA,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere?   =   A)  1200 V B)  -1200 V C)  140 V D)  -0.45 V" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1200 V
B)   -1200 V
C)   140 V
D)   -0.45 VE) A) and B)
F) C) and D)

Question 8

A negative charge is moved from point A to point B along an equipotential surface.Which of the following statements must be true for this case?

Accepted Answer

A)   The negative charge performs work in moving from point A to point B.
B)   Work is required to move the negative charge from point A to point B.
C)   No work is required to move the negative charge from point A to point B.
D)   The work done on the charge depends on the distance between A and B.
E)   Work is done in moving the negative charge from point A to point B.F) A) and C)
G) A) and B)

Question 9

A negative charge,if free,will tend to move

Accepted Answer

A)   from high potential to low potential.
B)   from low potential to high potential.
C)   toward infinity.
D)   away from infinity.
E)   in the direction of the electric field.F) B) and E)
G) C) and D)

Question 10

A conducting sphere 45 cm in diameter carries an excess of charge,and no other charges are present.You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity.(k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2) The excess charge on this sphere is closest to

Accepted Answer

A)   0.35 nC.
B)   79 nC.
C)   315 nC.
D)   350 nC.
E)   700 nC.F) C) and D)
G) B) and E)

Question 11

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm.The electric potential of the inner conductor,with respect to the outer conductor,is +600 V.An electron is released from rest at the surface of the outer conductor.What is the speed of the electron as it reaches the inner conductor? 7 m/s B)  1.3 × 107 m/s C)  1.5 × 107 m/s D)  1.7 × 107 m/s E)  1.9 × 107 m/s" class="answers-bank-image d-inline" rel="preload" > , 7 m/s B)  1.3 × 107 m/s C)  1.5 × 107 m/s D)  1.7 × 107 m/s E)  1.9 × 107 m/s" class="answers-bank-image d-inline" rel="preload" > , 7 m/s B)  1.3 × 107 m/s C)  1.5 × 107 m/s D)  1.7 × 107 m/s E)  1.9 × 107 m/s" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1.1 × 107 m/s
B)   1.3 × 107 m/s
C)   1.5 × 107 m/s
D)   1.7 × 107 m/s
E)   1.9 × 107 m/sF) A) and C)
G) None of the above

Question 12

The figure shows two arcs of a circle on which charges +Q and -Q have been spread uniformly.What is the value of the electric potential at the center of the circle?

Accepted Answer

The answer of The figure shows two arcs of a...

Question 13

A nonconducting sphere contains positive charge distributed uniformly throughout its volume.Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity.(There may be more than one correct choice.)

Accepted Answer

A)   The potential is highest at the center of the sphere.
B)   The potential at the center of the sphere is zero.
C)   The potential at the center of the sphere is the same as the potential at the surface.
D)   The potential at the surface is higher than the potential at the center.
E)   The potential at the center is the same as the potential at infinity.F) A) and E)
G) A) and D)

Question 14

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Accepted Answer

A)   1.2 kV
B)   6.0 kV
C)   0.21 kV
D)   0.215 kVE) A) and D)
F) A) and B)

Question 15

Four point charges of magnitude 6.00 μC and of varying signs are placed at the corners of a square 2.00 m on each side,as shown in the figure.  (a)What is the electric potential (relative to infinity)at the center of this square due to these charges?
(b)What is the magnitude of the electric field due to these charges at the center of the square?

Accepted Answer

(a)zero
(...

Exam 23: Electric Potential

The figure shows two arcs of a circle on which charges +Q and -Q have been spread uniformly.What is the value of the electric potential at the center of the circle?

Correct Answer
verified

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

Correct Answer
verified

Correct Answer
verified

A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC,and no other charges are present.(k = 1/4πε₀ = The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to

Correct Answer
verified

Correct Answer
verified

A nonconducting sphere contains positive charge distributed uniformly throughout its volume.Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity.(There may be more than one correct choice.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
(a)zero
(...
View Answer

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm.The electric potential of the inner conductor,with respect to the outer conductor,is +600 V.What is the maximum electric field magnitude between the cylinders? =

Correct Answer
verified

If the electric field is zero everywhere inside a region of space,the potential must also be zero in that region.

Correct Answer
verified

A negative charge,if free,will tend to move

Correct Answer
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A sphere with radius 2.0 mm carries +1.0 μC of charge distributed uniformly throughout its volume.What is the potential difference,V_B - V_A,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere? =

Correct Answer
verified

A -3.0-μC point charge and a -9.0-μC point charge are initially extremely far apart.How much work does it take to bring the -3.0-μC charge to , and the to , ?

Correct Answer
verified

A negative charge is moved from point A to point B along an equipotential surface.Which of the following statements must be true for this case?

Correct Answer
verified

A conducting sphere 45 cm in diameter carries an excess of charge,and no other charges are present.You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity.(k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²) The excess charge on this sphere is closest to

Correct Answer
verified

Exam 23: Electric Potential

The figure shows two arcs of a circle on which charges +Q and -Q have been spread uniformly.What is the value of the electric potential at the center of the circle?

Correct AnswerverifiedShow Answer

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε0 = 8.99 × 109 N • m2/C2)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC,and no other charges are present.(k = 1/4πε0 = The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A nonconducting sphere contains positive charge distributed uniformly throughout its volume.Which statements about the potential due to this sphere are true? All potentials are measured relative to infinity.(There may be more than one correct choice.)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answerverified(a)zero (...View AnswerShow Answer

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm.The electric potential of the inner conductor,with respect to the outer conductor,is +600 V.What is the maximum electric field magnitude between the cylinders? =

Correct AnswerverifiedShow Answer

If the electric field is zero everywhere inside a region of space,the potential must also be zero in that region.

Correct AnswerverifiedShow Answer

A negative charge,if free,will tend to move

Correct AnswerverifiedShow Answer

A sphere with radius 2.0 mm carries +1.0 μC of charge distributed uniformly throughout its volume.What is the potential difference,VB - VA,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere? =

Correct AnswerverifiedShow Answer

A -3.0-μC point charge and a -9.0-μC point charge are initially extremely far apart.How much work does it take to bring the -3.0-μC charge to , and the to , ?

Correct AnswerverifiedShow Answer

A negative charge is moved from point A to point B along an equipotential surface.Which of the following statements must be true for this case?

Correct AnswerverifiedShow Answer

A conducting sphere 45 cm in diameter carries an excess of charge,and no other charges are present.You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity.(k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2) The excess charge on this sphere is closest to

Correct AnswerverifiedShow Answer

Correct Answer
verified

An extremely long thin wire carries a uniform linear charge density of 358 nC/m.Find the potential difference between points 5.0 m and 6.0 m from the wire,provided they are not near either end of the wire.(k = 1/4πε₀ = 8.99 × 10⁹ N • m²/C²)

Correct Answer
verified

Correct Answer
verified

A conducting sphere of radius 20.0 cm carries an excess charge of +15.0 µC,and no other charges are present.(k = 1/4πε₀ = The potential (relative to infinity) due to this sphere at a point 12.0 cm from its center is closest to

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
(a)zero
(...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A sphere with radius 2.0 mm carries +1.0 μC of charge distributed uniformly throughout its volume.What is the potential difference,V_B - V_A,between point B,which is 4.0 m from the center of the sphere,and point A,which is 9.0 m from the center of the sphere? =

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A conducting sphere 45 cm in diameter carries an excess of charge,and no other charges are present.You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity.(k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²) The excess charge on this sphere is closest to

Correct Answer
verified