Question 1

Four point charges of equal magnitude but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the center charge?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) None of the above
F) All of the above

Question 2

Three equal-magnitude point charges of varying signs are placed at three of the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the vacant corner of the square?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) A) and C) B

Question 3

If a charge generator builds a negative static charge of - 7.00µC. How many electrons are transferred to it during this process.(e = 1.60 × 10-19C)

Accepted Answer

A)  4.38 × 1013
B)  7.0
C)  1.12 × 10-18
D)  43.8E) B) and C)
F) None of the above

Question 4

Two tiny particles having charges of +7.00 μC and -9.00 μC are placed along the y-axis.The +7.00-µC particle is at y = 0.00 cm,and the other particle is at y = 40.00 cm.Where must a third charged particle be placed along the y-axis so that it does not experience any net electric force due to the other two particles?

Accepted Answer

A)  0.200 m
B)  2.99 m
C)  -0.187 m
D)  -2.99 m
E)  0.187 mF) B) and C)
G) C) and D)

Question 5

Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above it.How far above the electron would the proton have to be? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2,e = 1.6 × 10-19 C,mproton = 1.67 × 10-27 kg,melectron = 9.11 × 10-31 kg)

Accepted Answer

A)  1.5 m
B)  2.3 m
C)  3.7 m
D)  4.6 m
E)  5.1 mF) A) and C)
G) A) and E)

Question 6

Three equal-magnitude point charges of varying signs are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) All of the above
F) A) and B)

Question 7

The figure shows electric field lines arising from two small charged particles P and Q.Consider the following two statements:
(i) The charge on P is smaller than the charge on Q.
(ii) The electrostatic force on P is smaller than the force on Q. 
Which of the above statements are true?

Accepted Answer

A)  Only (i) is true.
B)  Only (ii) is true.
C)  Both (i) and (ii) are true.
D)  Neither (i) nor (ii) is true.E) A) and D)
F) A) and C)

Question 8

A conductor is placed in a steady external electric field.Which of the following statements are correct for this situation? (There could be more than one correct choice. )

Accepted Answer

A)  The electric field is zero inside the conductor.
B)  All the free electrons go to the surface of the conductor.
C)  The surface of the conductor is neutral.
D)  The electric field just outside the surface of the conductor is perpendicular to the surface.
E)  None of the above statements are correct.F) C) and D)
G) A) and C)

Question 9

A small object with a 5.0-μC charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field.If the object has a mass of 2.0 g,what is the magnitude of the electric field?

Accepted Answer

A)  2.0 N/C
B)  4.0 N/C
C)  0.0020 N/C
D)  0.0040 N/C
E)  1.0 N/CF) A) and B)
G) A) and C)

Question 10

As shown in the figure,three charges are at corners of a rectangle.The charge in the bottom right corner is Q = - 90 nC,and all the other quantities are accurate to two significant figures.What is the magnitude of the net electrical force on Q due to the other two charges? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)  0 = 9.0 × 109 N ∙ m2/C2)    A) 3.8 × 10-2 N B) 2.8 × 10-2 N C) 5.3 × 10-2 N D) 7.1 × 10-2 N" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  3.8 × 10-2 N
B)  2.8 × 10-2 N
C)  5.3 × 10-2 N
D)  7.1 × 10-2 NE) A) and B)
F) B) and C)

Question 11

In outer space,a positive charge q is released near a positive fixed charge Q,as shown in the figure.As q moves away from Q,what is true about the motion of q? (There may be more than one correct choice. )

Accepted Answer

A)  It will move with decreasing speed.
B)  It will move with constant acceleration.
C)  It will move with increasing acceleration.
D)  It will move with decreasing acceleration.
E)  It will move with increasing speed.F) C) and D)
G) None of the above

Question 12

As shown in the figure,the charge Q is midway between two other charges.If 
What must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?

Accepted Answer

A)  30 nC
B)  15 nC
C)  7.5 nC
D)  60 nCE) A) and B)
F) None of the above

Question 13

An electron is projected with an initial velocity v0 = 8.4 × 0 = 8.4 ×   M/s along the y-axis,which is the centerline between a pair of charged plates,as shown in the figure.The plates are 1.0 m long and are separated by 0.10 m.A uniform electric field of magnitude E in the +x-direction is present between the plates.If the magnitude of the acceleration of the electron is measured to be   What is the magnitude of the electric field between the plates? (e = 1.6 × 10-19 C,melectron = 9.11 × 10-31 kg)    A) 51,000 N/C B) 45,000 N/C C) 40,000 N/C D) 35,000 N/C E) 29,000 N/C" class="answers-bank-image d-inline" rel="preload" >
M/s along the y-axis,which is the centerline between a pair of charged plates,as shown in the figure.The plates are 1.0 m long and are separated by 0.10 m.A uniform electric field of magnitude E in the +x-direction is present between the plates.If the magnitude of the acceleration of the electron is measured to be 0 = 8.4 ×   M/s along the y-axis,which is the centerline between a pair of charged plates,as shown in the figure.The plates are 1.0 m long and are separated by 0.10 m.A uniform electric field of magnitude E in the +x-direction is present between the plates.If the magnitude of the acceleration of the electron is measured to be   What is the magnitude of the electric field between the plates? (e = 1.6 × 10-19 C,melectron = 9.11 × 10-31 kg)    A) 51,000 N/C B) 45,000 N/C C) 40,000 N/C D) 35,000 N/C E) 29,000 N/C" class="answers-bank-image d-inline" rel="preload" >
What is the magnitude of the electric field between the plates? (e = 1.6 × 10-19 C,melectron = 9.11 × 10-31 kg)  0 = 8.4 ×   M/s along the y-axis,which is the centerline between a pair of charged plates,as shown in the figure.The plates are 1.0 m long and are separated by 0.10 m.A uniform electric field of magnitude E in the +x-direction is present between the plates.If the magnitude of the acceleration of the electron is measured to be   What is the magnitude of the electric field between the plates? (e = 1.6 × 10-19 C,melectron = 9.11 × 10-31 kg)    A) 51,000 N/C B) 45,000 N/C C) 40,000 N/C D) 35,000 N/C E) 29,000 N/C" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  51,000 N/C
B)  45,000 N/C
C)  40,000 N/C
D)  35,000 N/C
E)  29,000 N/CF) C) and D)
G) A) and B) A

Question 14

A small glass bead has been charged to 1.9 nC.What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2)

Accepted Answer

A)  4.3 × 104 N/C
B)  8.5 × 102 N/C
C)  8.1 × 10-5 N/C
D)  8.5 × 10-7 N/CE) A) and B)
F) A) and D)

Question 15

Three equal positive point charges +q are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) B) and D)
F) A) and C)

Question 16

An electron is initially moving to the right when it enters a uniform electric field directed upwards,as shown in the figure.Which trajectory (X,Y,Z,or W) will the electron follow in the field?

Accepted Answer

A)  trajectory W
B)  trajectory X
C)  trajectory Y
D)  trajectory ZE) A) and B)
F) A) and C)

Question 17

Two point charges each experience a 1-N electrostatic force when they are 2 cm apart.If they are moved to a new separation of 8 cm,what is the magnitude of the electric force on each of them?

Accepted Answer

A)  2 N
B)  1/2 N
C)  1/4 N
D)  1/8 N
E)  1/16 NF) B) and E)
G) C) and D) E

Question 18

A negatively-charged rod is brought close to (but does not touch) two neutral spheres that are in contact with each other but insulated from the ground.If the two spheres are then separated,what kind of charge will be on the spheres?

Accepted Answer

A)  The sphere near the charged rod becomes positive and the other one becomes negative.
B)  The sphere near the charged rod becomes negative and the other one becomes positive.
C)  The spheres do not get any charge.
D)  Both spheres become negative.
E)  Both spheres become positive.F) A) and D)
G) All of the above

Question 19

Four point charges of varying magnitude and sign are arranged on the corners of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the point charge with a charge +Q?

Accepted Answer

A)  A
B)  B
C)  C
D)  DE) A) and B)
F) A) and C)

Question 20

The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C.What is the object's charge q? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2)

Accepted Answer

A)  -16 nC
B)  +16 nC
C)  -17 nC
D)  +17 nCE) All of the above
F) A) and B)

Exam 19: Electric Charges, Forces, and Fields

Four point charges of equal magnitude but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the center charge?

Correct Answer
verified

Three equal-magnitude point charges of varying signs are placed at three of the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the vacant corner of the square?

Correct Answer
verified
B

If a charge generator builds a negative static charge of - 7.00µC. How many electrons are transferred to it during this process.(e = 1.60 × 10^-19C)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Three equal-magnitude point charges of varying signs are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Correct Answer
verified

The figure shows electric field lines arising from two small charged particles P and Q.Consider the following two statements: (i) The charge on P is smaller than the charge on Q. (ii) The electrostatic force on P is smaller than the force on Q. Which of the above statements are true?

Correct Answer
verified

A conductor is placed in a steady external electric field.Which of the following statements are correct for this situation? (There could be more than one correct choice. )

Correct Answer
verified

A small object with a 5.0-μC charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field.If the object has a mass of 2.0 g,what is the magnitude of the electric field?

Correct Answer
verified

Correct Answer
verified

In outer space,a positive charge q is released near a positive fixed charge Q,as shown in the figure.As q moves away from Q,what is true about the motion of q? (There may be more than one correct choice. )

Correct Answer
verified

As shown in the figure,the charge Q is midway between two other charges.If What must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?

Correct Answer
verified

Correct Answer
verified
A

A small glass bead has been charged to 1.9 nC.What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

Correct Answer
verified

Three equal positive point charges +q are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Correct Answer
verified

An electron is initially moving to the right when it enters a uniform electric field directed upwards,as shown in the figure.Which trajectory (X,Y,Z,or W) will the electron follow in the field?

Correct Answer
verified

Two point charges each experience a 1-N electrostatic force when they are 2 cm apart.If they are moved to a new separation of 8 cm,what is the magnitude of the electric force on each of them?

Correct Answer
verified
E

A negatively-charged rod is brought close to (but does not touch) two neutral spheres that are in contact with each other but insulated from the ground.If the two spheres are then separated,what kind of charge will be on the spheres?

Correct Answer
verified

Four point charges of varying magnitude and sign are arranged on the corners of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the point charge with a charge +Q?

Correct Answer
verified

The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C.What is the object's charge q? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

Correct Answer
verified

Exam 19: Electric Charges, Forces, and Fields

Four point charges of equal magnitude but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the center charge?

Correct AnswerverifiedShow Answer

Three equal-magnitude point charges of varying signs are placed at three of the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the vacant corner of the square?

Correct AnswerverifiedB

If a charge generator builds a negative static charge of - 7.00µC. How many electrons are transferred to it during this process.(e = 1.60 × 10-19C)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Three equal-magnitude point charges of varying signs are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Correct AnswerverifiedShow Answer

The figure shows electric field lines arising from two small charged particles P and Q.Consider the following two statements: (i) The charge on P is smaller than the charge on Q. (ii) The electrostatic force on P is smaller than the force on Q. Which of the above statements are true?

Correct AnswerverifiedShow Answer

A conductor is placed in a steady external electric field.Which of the following statements are correct for this situation? (There could be more than one correct choice. )

Correct AnswerverifiedShow Answer

A small object with a 5.0-μC charge is accelerating horizontally on a friction-free surface at 0.0050 m/s2 due only to an electric field.If the object has a mass of 2.0 g,what is the magnitude of the electric field?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In outer space,a positive charge q is released near a positive fixed charge Q,as shown in the figure.As q moves away from Q,what is true about the motion of q? (There may be more than one correct choice. )

Correct AnswerverifiedShow Answer

As shown in the figure,the charge Q is midway between two other charges.If What must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA

A small glass bead has been charged to 1.9 nC.What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2)

Correct AnswerverifiedShow Answer

Three equal positive point charges +q are placed at the corners of a square of side d as shown in the figure.Which one of the arrows shown represents the direction of the net electric field at the center of the square?

Correct AnswerverifiedShow Answer

An electron is initially moving to the right when it enters a uniform electric field directed upwards,as shown in the figure.Which trajectory (X,Y,Z,or W) will the electron follow in the field?

Correct AnswerverifiedShow Answer

Two point charges each experience a 1-N electrostatic force when they are 2 cm apart.If they are moved to a new separation of 8 cm,what is the magnitude of the electric force on each of them?

Correct AnswerverifiedE

A negatively-charged rod is brought close to (but does not touch) two neutral spheres that are in contact with each other but insulated from the ground.If the two spheres are then separated,what kind of charge will be on the spheres?

Correct AnswerverifiedShow Answer

Four point charges of varying magnitude and sign are arranged on the corners of the square of side d as shown in the figure.Which one of the arrows shown represents the net force acting on the point charge with a charge +Q?

Correct AnswerverifiedShow Answer

The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C.What is the object's charge q? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2)

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
B

If a charge generator builds a negative static charge of - 7.00µC. How many electrons are transferred to it during this process.(e = 1.60 × 10^-19C)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

A small glass bead has been charged to 1.9 nC.What is the strength of the electric field 2.0 cm from the center of the bead? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

The electric field at a point 2.8 cm from a small object points toward the object with a strength of 180,000 N/C.What is the object's charge q? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

Correct Answer
verified