Question 1

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10-6 C,what is the tension in the string?

Accepted Answer

A)  0.238 N
B)  0.279 N
C)  0.303 N
D)  0.268 N
E)  0.291 N

Question 2

The figure shows a hollow conducting spherical shell with an inner radius of 8 cm and an outer radius of 10 cm.A charge,q,placed at the center of the shell causes an electric field at the inner surface of the shell,Ei,which has a magnitude of 80 N/C and points toward the center of the sphere.Additionally,there is an electric field at the outer surface,Eo,which has a magnitude of 80 N/C and points away from the center of the sphere.Determine the charge on the spherical shell. i,which has a magnitude of 80 N/C and points toward the center of the sphere.Additionally,there is an electric field at the outer surface,Eo,which has a magnitude of 80 N/C and points away from the center of the sphere.Determine the charge on the spherical shell.   A) 0 C B) + 5.69 * 10-11 C C) + 8.89 * 10-11 C D) + 1.46 * 10-10 C " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0 C
B)  + 5.69 * 10-11 C
C)  + 8.89 * 10-11 C
D)  + 1.46 * 10-10 C

Question 3

What is the electric field 0.25 m away from a -6.5  μ\muμ C point charge?

Accepted Answer

A)  6.1 N/C towards the point charge
B)  6.1 N/C away from the point charge
C)  9.4 * 105 N/C towards the point charge
D)  9.4 * 105 N/C away from the point charge
E)  1.5 N/C towards the point charge

Question 4

A metal sphere of radius R = 12 cm carries a total charge of Q = 1  μ\muμ C.What is the magnitude of the electric field just outside the sphere?

Accepted Answer

A)  1.25 N/C
B)  425 N/C
C)  85,200 N/C
D)  625,000 N/C
E)  1.25 * 108 N/C

Question 5

Inside a spherical surface is a 5.3 * 10-6C and a -2.2 * 10-6 C charge.What is the total electric flux through the surface of the sphere in units of N m2/C?

Accepted Answer

A)  3.4 * 10-16
B)  2.8 * 104
C)  3.5 * 105
D)  3.1 * 106
E)  To find the flux,the area must be known.

Question 6

Consider a cubical box that contains a charge distribution of total charge q = 6.40  μ\muμ C.The total electric flux through 5 of the 6 sides is  Φ\varPhiΦ  = 3.90 *105 Nm2/C.What is the electric flux through the remaining sixth surface of the box (in Nm2/C) ? 5 Nm2/C.What is the electric flux through the remaining sixth surface of the box (in Nm2/C) ?   A) 3.33 * 105 B) 3.90 * 105 C) 4.56 * 105 D) 5.34 * 105 E) 6.24 * 105  " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  3.33 * 105
B)  3.90 * 105
C)  4.56 * 105
D)  5.34 * 105
E)  6.24 * 105

Question 7

Two identical point charges Q are placed each diagonally opposite corners of a square (1.0 m on a side) .The magnitude of the electric field at either of the two unoccupied corners is 19.1 N/C.The absolute value of the charge Q is

Accepted Answer

A)  1.5 nC.
B)  2.4 nC.
C)  3.2 nC.
D)  4.7 nC.
E)  5.9 nC.

Question 8

A + 5.00-nC point charge is placed on the x axis at x = 1.00 m,and a - 6.00-nC point charge is placed on the y axis at y = -2.00 m.What is the direction of the electric field at the origin?

Accepted Answer

A)  189 ∘\circ∘ 
B)  191 ∘\circ∘ 
C)  193 ∘\circ∘ 
D)  195 ∘\circ∘ 
E)  197 ∘\circ∘

Question 9

Four electric fields,E1,E2,E3, and E4 are produced at four different points,1,2,3,and 4 by charges q,2q,q,and 2q,respectively.If the distances of the four points from the charges are 10,10,20,and 20 cm,respectively,rank in order from smallest to largest their electric field strengths.

Accepted Answer

A)  E3 4 2 1
B)  E3 1 2 4
C)  E2 1 4 3
D)  E3 4 1 2

Question 10

Three charges are placed at the corners of an equilateral triangle that is 0.16 m on each side.The first charge is 3.4  μ\muμ C,the second is 2.2  μ\muμ C and the third is 1.6  μ\muμ C.What is the magnitude of the electric field at the center of the triangle due to the three charges?

Accepted Answer

A)  2.9 * 105 N/C
B)  5.9 * 104 N/C
C)  2.3 * 105 N/C
D)  1.7 * 106 N/C
E)  1.5 * 105 N/C

Question 11

A small charge is in a constant vertical electric field E = 1.32 * 103 N/C in the positive y-direction.If the charge has a mass of 0.022 kg and its acceleration is -1.0 m/s2,what is the charge? There is no gravity.

Accepted Answer

A)  -11  μ\muμ C
B)  -17  μ\muμ C
C)  +11  μ\muμ C
D)  +17  μ\muμ C
E)  -21  μ\muμ C

Question 12

A point charge q is located at the center of a sphere of radius R.The sphere is then surrounded concentrically by a uniform ring having linear charge density  λ\lambdaλ  and radius a (a >R) .The flux through the sphere is

Accepted Answer

A)  q/ λ\lambdaλ o.
B)  (q +  λ\lambdaλ *2 π\piπ a) / ε\varepsilonε 0.
C)  (q -  λ\lambdaλ *2 π\piπ a) / ε\varepsilonε 0.
D)  0.

Question 13

A cubical box has six faces,each 20 cm * 20 cm.The flux through each face is (the sides are labeled like a die,sides 1 and 6 are opposite to each other,as are 2 and 5,and 3 and 4. Side Flux (Nm2/C) 
1 -120
2 + 300
3 -100
4 + 600
5 -40
6 -150
Find the net charge inside the cube.

Accepted Answer

A)  1.7 * 10-10 C
B)  4.8 * 10-10 C
C)  2.2 * 10-9 C
D)  4.3 * 10-9 C
E)  More information is needed.

Question 14

Two electrons are located at two of the vertices of an equilateral triangle,one at each vertex.The length of one side of the triangle is 1.00 nm.What is the magnitude of the net electric field at the third vertex?

Accepted Answer

A)  1.44 * 109 N/C
B)  2.03 * 109 N/C
C)  2.49 * 109 N/C
D)  2.88 * 109 N/C

Question 15

An electric dipole has opposite charges of 2.0 * 10-15 C which are separated by a distance of 0.40 mm.It is oriented at 40 ∘\circ∘ with respect to a uniform electric field of 1.0 * 103 N/C.Determine the magnitude of the torque exerted on the dipole by the electric field.

Accepted Answer

A)  2.2 * 10-16 Nm
B)  3.8 * 10-16 Nm
C)  5.1 * 10-16 Nm
D)  6.7 * 10-16 Nm
E)  8.0 * 10-16 Nm

Question 16

A point charge of 7.8  μ\muμ C is located inside a hemisphere,which consists of two surfaces: a flat disk topped by half a sphere.If the electric flux through the half-sphere is 5.3 * 105 Nm2/C,what is the flux through the flat disk section?

Accepted Answer

A)  2.3 * 105 Nm2/C
B)  3.5 * 105 Nm2/C
C)  5.3 * 105 Nm2/C
D)  8.83 * 105 Nm2/C
E)  More information is required to determine this flux.

Question 17

The electrons in a particle beam each have a kinetic energy of 1.6 * 10-16 J,enter an electric field of 2000 N/C and are stopped.What is the stopping distance of these electrons?

Accepted Answer

A)  3.2 m
B)  2.0 m
C)  0.25 m
D)  4.0 m
E)  0.50 m

Question 18

Consider a proton placed near an infinite plane of positive charge with no other objects close by.The proton would

Accepted Answer

A)  accelerate away from the plane of charge with ever decreasing acceleration.
B)  remain motionless.
C)  accelerate toward the plane of charge with ever increasing acceleration.
D)  move toward the plane of charge at constant acceleration.
E)  move away from the plane of charge at constant acceleration.

Question 19

A + 3.5-nC point charge is placed at one corner of a square (2.0 m on a side) ,and a -5.7-nC charge is placed on a corner diagonally away from the first charge.What is the magnitude of the electric field at either of the two unoccupied corners?

Accepted Answer

A)  26 N/C
B)  23 N/C
C)  18 N/C
D)  15 N/C
E)  7.6 N/C

Question 20

Two ions are placed on the x-axis.One has a charge of + e and is located at the origin.The other has a charge of -4e and is located at x = + d,where d > 0.Where on the x-axis is the net electric field equal to zero?

Accepted Answer

A)  x = -2d
B)  x = -d
C)  x = + d
D)  x = + 2d

Exam 22: Electric Fields and Gausss Law

Correct Answer
verified

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10^-6 C,what is the tension in the string?

Correct Answer
verified

A small charge is in a constant vertical electric field E = 1.32 * 10³ N/C in the positive y-direction.If the charge has a mass of 0.022 kg and its acceleration is -1.0 m/s²,what is the charge? There is no gravity.

Correct Answer
verified

A point charge of 7.8 $\mu$ C is located inside a hemisphere,which consists of two surfaces: a flat disk topped by half a sphere.If the electric flux through the half-sphere is 5.3 * 10⁵ Nm²/C,what is the flux through the flat disk section?

Correct Answer
verified

Three charges are placed at the corners of an equilateral triangle that is 0.16 m on each side.The first charge is 3.4 $\mu$ C,the second is 2.2 $\mu$ C and the third is 1.6 $\mu$ C.What is the magnitude of the electric field at the center of the triangle due to the three charges?

Correct Answer
verified

Correct Answer
verified

The electrons in a particle beam each have a kinetic energy of 1.6 * 10^-16 J,enter an electric field of 2000 N/C and are stopped.What is the stopping distance of these electrons?

Correct Answer
verified

A + 3.5-nC point charge is placed at one corner of a square (2.0 m on a side) ,and a -5.7-nC charge is placed on a corner diagonally away from the first charge.What is the magnitude of the electric field at either of the two unoccupied corners?

Correct Answer
verified

Consider a proton placed near an infinite plane of positive charge with no other objects close by.The proton would

Correct Answer
verified

An electric dipole has opposite charges of 2.0 * 10^-15 C which are separated by a distance of 0.40 mm.It is oriented at 40^$\circ$with respect to a uniform electric field of 1.0 * 10³ N/C.Determine the magnitude of the torque exerted on the dipole by the electric field.

Correct Answer
verified

Two ions are placed on the x-axis.One has a charge of + e and is located at the origin.The other has a charge of -4e and is located at x = + d,where d > 0.Where on the x-axis is the net electric field equal to zero?

Correct Answer
verified

What is the electric field 0.25 m away from a -6.5 $\mu$ C point charge?

Correct Answer
verified

A point charge q is located at the center of a sphere of radius R.The sphere is then surrounded concentrically by a uniform ring having linear charge density $\lambda$ and radius a (a >R) .The flux through the sphere is

Correct Answer
verified

A cubical box has six faces,each 20 cm * 20 cm.The flux through each face is (the sides are labeled like a die,sides 1 and 6 are opposite to each other,as are 2 and 5,and 3 and 4. Side Flux (Nm²/C) 1 -120 2 + 300 3 -100 4 + 600 5 -40 6 -150 Find the net charge inside the cube.

Correct Answer
verified

Four electric fields,E₁,E₂,E_3, and E₄ are produced at four different points,1,2,3,and 4 by charges q,2q,q,and 2q,respectively.If the distances of the four points from the charges are 10,10,20,and 20 cm,respectively,rank in order from smallest to largest their electric field strengths.

Correct Answer
verified

Two identical point charges Q are placed each diagonally opposite corners of a square (1.0 m on a side) .The magnitude of the electric field at either of the two unoccupied corners is 19.1 N/C.The absolute value of the charge Q is

Correct Answer
verified

A metal sphere of radius R = 12 cm carries a total charge of Q = 1 $\mu$ C.What is the magnitude of the electric field just outside the sphere?

Correct Answer
verified

A + 5.00-nC point charge is placed on the x axis at x = 1.00 m,and a - 6.00-nC point charge is placed on the y axis at y = -2.00 m.What is the direction of the electric field at the origin?

Correct Answer
verified

Inside a spherical surface is a 5.3 * 10^-6C and a -2.2 * 10^-6 C charge.What is the total electric flux through the surface of the sphere in units of N m²/C?

Correct Answer
verified

Two electrons are located at two of the vertices of an equilateral triangle,one at each vertex.The length of one side of the triangle is 1.00 nm.What is the magnitude of the net electric field at the third vertex?

Correct Answer
verified

Exam 22: Electric Fields and Gausss Law

Consider a cubical box that contains a charge distribution of total charge q = 6.40 μ\muμ C.The total electric flux through 5 of the 6 sides is Φ\varPhiΦ = 3.90 *105 Nm2/C.What is the electric flux through the remaining sixth surface of the box (in Nm2/C) ?

Correct AnswerverifiedShow Answer

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10-6 C,what is the tension in the string?

Correct AnswerverifiedShow Answer

A small charge is in a constant vertical electric field E = 1.32 * 103 N/C in the positive y-direction.If the charge has a mass of 0.022 kg and its acceleration is -1.0 m/s2,what is the charge? There is no gravity.

Correct AnswerverifiedShow Answer

A point charge of 7.8 μ\muμ C is located inside a hemisphere,which consists of two surfaces: a flat disk topped by half a sphere.If the electric flux through the half-sphere is 5.3 * 105 Nm2/C,what is the flux through the flat disk section?

Correct AnswerverifiedShow Answer

Three charges are placed at the corners of an equilateral triangle that is 0.16 m on each side.The first charge is 3.4 μ\muμ C,the second is 2.2 μ\muμ C and the third is 1.6 μ\muμ C.What is the magnitude of the electric field at the center of the triangle due to the three charges?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The electrons in a particle beam each have a kinetic energy of 1.6 * 10-16 J,enter an electric field of 2000 N/C and are stopped.What is the stopping distance of these electrons?

Correct AnswerverifiedShow Answer

A + 3.5-nC point charge is placed at one corner of a square (2.0 m on a side) ,and a -5.7-nC charge is placed on a corner diagonally away from the first charge.What is the magnitude of the electric field at either of the two unoccupied corners?

Correct AnswerverifiedShow Answer

Consider a proton placed near an infinite plane of positive charge with no other objects close by.The proton would

Correct AnswerverifiedShow Answer

An electric dipole has opposite charges of 2.0 * 10-15 C which are separated by a distance of 0.40 mm.It is oriented at 40 ∘\circ∘ with respect to a uniform electric field of 1.0 * 103 N/C.Determine the magnitude of the torque exerted on the dipole by the electric field.

Correct AnswerverifiedShow Answer

Two ions are placed on the x-axis.One has a charge of + e and is located at the origin.The other has a charge of -4e and is located at x = + d,where d > 0.Where on the x-axis is the net electric field equal to zero?

Correct AnswerverifiedShow Answer

What is the electric field 0.25 m away from a -6.5 μ\muμ C point charge?

Correct AnswerverifiedShow Answer

A point charge q is located at the center of a sphere of radius R.The sphere is then surrounded concentrically by a uniform ring having linear charge density λ\lambdaλ and radius a (a >R) .The flux through the sphere is

Correct AnswerverifiedShow Answer

A cubical box has six faces,each 20 cm * 20 cm.The flux through each face is (the sides are labeled like a die,sides 1 and 6 are opposite to each other,as are 2 and 5,and 3 and 4. Side Flux (Nm2/C) 1 -120 2 + 300 3 -100 4 + 600 5 -40 6 -150 Find the net charge inside the cube.

Correct AnswerverifiedShow Answer

Four electric fields,E1,E2,E3, and E4 are produced at four different points,1,2,3,and 4 by charges q,2q,q,and 2q,respectively.If the distances of the four points from the charges are 10,10,20,and 20 cm,respectively,rank in order from smallest to largest their electric field strengths.

Correct AnswerverifiedShow Answer

Two identical point charges Q are placed each diagonally opposite corners of a square (1.0 m on a side) .The magnitude of the electric field at either of the two unoccupied corners is 19.1 N/C.The absolute value of the charge Q is

Correct AnswerverifiedShow Answer

A metal sphere of radius R = 12 cm carries a total charge of Q = 1 μ\muμ C.What is the magnitude of the electric field just outside the sphere?

Correct AnswerverifiedShow Answer

A + 5.00-nC point charge is placed on the x axis at x = 1.00 m,and a - 6.00-nC point charge is placed on the y axis at y = -2.00 m.What is the direction of the electric field at the origin?

Correct AnswerverifiedShow Answer

Inside a spherical surface is a 5.3 * 10-6C and a -2.2 * 10-6 C charge.What is the total electric flux through the surface of the sphere in units of N m2/C?

Correct AnswerverifiedShow Answer

Two electrons are located at two of the vertices of an equilateral triangle,one at each vertex.The length of one side of the triangle is 1.00 nm.What is the magnitude of the net electric field at the third vertex?

Correct AnswerverifiedShow Answer

Correct Answer
verified

A charged metal ball of mass,m hangs from a string.An electric field of 15,000 N/C,pointing to the right,is then turned on.After the electric field is turned on,the ball hangs at a 20 degree angle away from the vertical.If the charge on the ball is 6.1 * 10^-6 C,what is the tension in the string?

Correct Answer
verified

A small charge is in a constant vertical electric field E = 1.32 * 10³ N/C in the positive y-direction.If the charge has a mass of 0.022 kg and its acceleration is -1.0 m/s²,what is the charge? There is no gravity.

Correct Answer
verified

A point charge of 7.8 $\mu$ C is located inside a hemisphere,which consists of two surfaces: a flat disk topped by half a sphere.If the electric flux through the half-sphere is 5.3 * 10⁵ Nm²/C,what is the flux through the flat disk section?

Correct Answer
verified

Three charges are placed at the corners of an equilateral triangle that is 0.16 m on each side.The first charge is 3.4 $\mu$ C,the second is 2.2 $\mu$ C and the third is 1.6 $\mu$ C.What is the magnitude of the electric field at the center of the triangle due to the three charges?

Correct Answer
verified

Correct Answer
verified

The electrons in a particle beam each have a kinetic energy of 1.6 * 10^-16 J,enter an electric field of 2000 N/C and are stopped.What is the stopping distance of these electrons?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An electric dipole has opposite charges of 2.0 * 10^-15 C which are separated by a distance of 0.40 mm.It is oriented at 40^$\circ$with respect to a uniform electric field of 1.0 * 10³ N/C.Determine the magnitude of the torque exerted on the dipole by the electric field.

Correct Answer
verified

Correct Answer
verified

What is the electric field 0.25 m away from a -6.5 $\mu$ C point charge?

Correct Answer
verified

A point charge q is located at the center of a sphere of radius R.The sphere is then surrounded concentrically by a uniform ring having linear charge density $\lambda$ and radius a (a >R) .The flux through the sphere is

Correct Answer
verified

A cubical box has six faces,each 20 cm * 20 cm.The flux through each face is (the sides are labeled like a die,sides 1 and 6 are opposite to each other,as are 2 and 5,and 3 and 4. Side Flux (Nm²/C) 1 -120 2 + 300 3 -100 4 + 600 5 -40 6 -150 Find the net charge inside the cube.

Correct Answer
verified

Four electric fields,E₁,E₂,E_3, and E₄ are produced at four different points,1,2,3,and 4 by charges q,2q,q,and 2q,respectively.If the distances of the four points from the charges are 10,10,20,and 20 cm,respectively,rank in order from smallest to largest their electric field strengths.

Correct Answer
verified

Correct Answer
verified

A metal sphere of radius R = 12 cm carries a total charge of Q = 1 $\mu$ C.What is the magnitude of the electric field just outside the sphere?

Correct Answer
verified

Correct Answer
verified

Inside a spherical surface is a 5.3 * 10^-6C and a -2.2 * 10^-6 C charge.What is the total electric flux through the surface of the sphere in units of N m²/C?

Correct Answer
verified

Correct Answer
verified