Question 1

At a distance D from a very long (essentially infinite)uniform line of charge,the electric field strength is 1000 N/C.At what distance from the line will the field strength to be 2000 N/C?

Accepted Answer

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

Question 2

If a rectangular area is rotated in a uniform electric field from the position where the maximum electric flux goes through it to an orientation where only half the flux goes through it,what has been the angle of rotation?

Accepted Answer

A)  45° 
B)  26.6° 
C)  90° 
D)  30° 
E)  60°

Question 3

If the electric flux through a closed surface is zero,the electric field at points on that surface must be zero.

Accepted Answer

A) True 
 B)False

Question 4

A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume.At a radial distance  from the center,the electric field has a magnitude E0.What is the magnitude of the electric field at a radial distance  ?

Accepted Answer

A)  E0/4 
B)  zero 
C)  E0/2 
D)  E0 
E)  2E0

Question 5

Two concentric conducting spherical shells produce a radially outward electric field of magnitude 49,000 N/C at a point 4.10 m from the center of the shells.The outer surface of the larger shell has a radius of 3.75 m.If the inner shell contains an excess charge of -5.30 μC,find the amount of charge on the outer surface of the larger shell.

Accepted Answer

The answer of Two concentric conducting spherical shells produce a...

Question 6

Under electrostatic conditions,the electric field just outside the surface of any charged conductor

Accepted Answer

A)  is always parallel to the surface. 
B)  is always zero because the electric field is zero inside conductors. 
C)  is always perpendicular to the surface of the conductor. 
D)  is perpendicular to the surface of the conductor only if it is a sphere, a cylinder, or a flat sheet. 
E)  can have nonzero components perpendicular to and parallel to the surface of the conductor.

Question 7

The cross section of a long coaxial cable is shown in the figure,with radii as given.The linear charge density on the inner conductor is  and the linear charge density on the outer conductor is  The inner and outer cylindrical surfaces are respectively denoted by A,B,C,and D,as shown.  The magnitude of the electric field at a point that is  from the axis is closest to

Accepted Answer

A)  17,000 N/C. 
B)  15,000 N/C. 
C)  13,000 N/C. 
D)  11,000 N/C. 
E)  9600 N/C.

Question 8

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m,as shown in the figure.The sphere carries an excess charge of  .A point charge of  is present at the center.The surface charge density on the inner spherical surface is closest to

Accepted Answer

A)  zero. 
B)  +4.0 × 10-8 C/m2. 
C)  +6.0 × 10-8 C/ m2. 
D)  -4.0 × 10-8 C/ m2. 
E)  -6.0 × 10-8 C/ m2.

Question 9

A nonuniform electric field is directed along the x-axis at all points in space.This magnitude of the field varies with x,but not with respect to y or z.The axis of a cylindrical surface,0.80 m long and 0.20 m in diameter,is aligned parallel to the x-axis,as shown in the figure.The electric fields E1 and E2,at the ends of the cylindrical surface,have magnitudes of  and  respectively,and are directed as shown.What is the net electric flux passing through the cylindrical surface?

Accepted Answer

A)  -160 N • m2/C 
B)  -350 N • m2/C 
C)  0.00 N • m2/C 
D)  +350 N • m2/C 
E)  +160 N • m2/C

Question 10

A nonuniform electric field is directed along the x-axis at all points in space.This magnitude of the field varies with x,but not with respect to y or z.The axis of a cylindrical surface,0.80 m long and 0.20 m in diameter,is aligned parallel to the x-axis,as shown in the figure.The electric fields E1 and E2,at the ends of the cylindrical surface,have magnitudes of  and  respectively,and are directed as shown.  The charge enclosed by the cylindrical surface is closest to

Accepted Answer

A)  -1.1 nC. 
B)  1.1 nC. 
C)  -2.4 nC. 
D)  -4.8 nC. 
E)  4.8 nC.

Question 11

As shown in the figure,a square insulating slab 5.0 mm thick measuring  has a charge of  distributed uniformly throughout its volume.Use Gauss's law to determine the electric field at point P,which is located within the slab beneath its center,1.0 mm from one of the faces.

Accepted Answer

A)  0.68 N/C 
B)  14 N/C 
C)  23 N/C 
D)  34 N/C 
E)  57 N/C

Question 12

An irregular conductor carries a surface charge density of -6.75 µC/m² at and in the vicinity of a point P on the surface.An electron is released just above P outside the conductor.What are the magnitude and direction of its acceleration the instant after it is released? , ,

Accepted Answer

The answer of An irregular conductor carries a surface charge...

Question 13

Four dipoles,each consisting of a +10-µC charge and a -10-µC charge,are located in the xy-plane with their centers 1.0 mm from the origin,as shown.A sphere passes through the dipoles,as shown in the figure.What is the electric flux through the sphere due to these dipoles?

Accepted Answer

A)  4.5 × 106 N • m2/C 
B)  0.00 N • m2/C 
C)  9.0 × 106 N • m2/C 
D)  11 × 105 N • m2/C

Question 14

A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume.At what distance,measured from the center of the sphere,does the electric field reach a value equal to half its maximum value?

Accepted Answer

A)  3.5 cm only 
B)  4.9 cm only 
C)  3.5 cm and 9.9 cm 
D)  3.5 cm and 4.9 cm 
E)  9.9 cm only

Question 15

A very large sheet of a conductor carries a uniform charge density of  on its surfaces.What is the electric field strength 3.00 mm outside the surface of the conductor?

Accepted Answer

A)  4.52 × 105 N/C 
B)  2.26 × 105 N/C 
C)  9.04 × 105 N/C 
D)  0.452 N/C 
E)  0.226 N/C

Question 16

A charge of 1.0 × 10-6 μC is located inside a sphere,1.25 cm from its center.What is the electric flux through the sphere due to this charge?

Accepted Answer

A)  0.11 N • m2/C 
B)  8.9 N • m2/C 
C)  0.028π N • m2/C 
D)  It cannot be determined without knowing the radius of the sphere.

Question 17

The cube of insulating material shown in the figure has one corner at the origin.Each side of the cube has length 0.080 m so the top face of the cube is parallel to the xz-plane and is at  .It is observed that there is an electric field  that is in the +y direction and whose magnitude depends only on y.Use Gauss's law to calculate the net charge enclosed by the cube.

Accepted Answer

The answer of The cube of insulating material shown in...

Question 18

The figure shows four Gaussian surfaces surrounding a distribution of charges. (a)Which Gaussian surfaces have an electric flux of +q/ε₀ through them? (b)Which Gaussian surfaces have no electric flux through them?

Accepted Answer

The answer of The figure shows four Gaussian surfaces surrounding...

Question 19

Consider a spherical Gaussian surface of radius R centered at the origin.A charge Q is placed inside the sphere.To maximize the magnitude of the flux of the electric field through the Gaussian surface,the charge should be located

Accepted Answer

A)  at x = 0, y = 0, z = R/2. 
B)  at the origin. 
C)  at x = R/2, y = 0, z = 0. 
D)  at x = 0, y = R/2, z = 0. 
E)  The charge can be located anywhere, since flux does not depend on the position of the charge as long as it is inside the sphere.

Question 20

Two extremely large nonconducting horizontal sheets each carry uniform charge density on the surfaces facing each other.The upper sheet carries  .The electric field midway between the sheets is  pointing downward.What is the surface charge density on the lower sheet?

Accepted Answer

The answer of Two extremely large nonconducting horizontal sheets each...

Exam 22: Gausss Law

At a distance D from a very long (essentially infinite) uniform line of charge,the electric field strength is 1000 N/C.At what distance from the line will the field strength to be 2000 N/C?

If a rectangular area is rotated in a uniform electric field from the position where the maximum electric flux goes through it to an orientation where only half the flux goes through it,what has been the angle of rotation?

If the electric flux through a closed surface is zero,the electric field at points on that surface must be zero.

A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume.At a radial distance from the center,the electric field has a magnitude E₀.What is the magnitude of the electric field at a radial distance ?

Under electrostatic conditions,the electric field just outside the surface of any charged conductor

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m,as shown in the figure.The sphere carries an excess charge of .A point charge of is present at the center.The surface charge density on the inner spherical surface is closest to

As shown in the figure,a square insulating slab 5.0 mm thick measuring has a charge of distributed uniformly throughout its volume.Use Gauss's law to determine the electric field at point P,which is located within the slab beneath its center,1.0 mm from one of the faces.

An irregular conductor carries a surface charge density of -6.75 µC/m² at and in the vicinity of a point P on the surface.An electron is released just above P outside the conductor.What are the magnitude and direction of its acceleration the instant after it is released? , ,

Four dipoles,each consisting of a +10-µC charge and a -10-µC charge,are located in the xy-plane with their centers 1.0 mm from the origin,as shown.A sphere passes through the dipoles,as shown in the figure.What is the electric flux through the sphere due to these dipoles?

A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume.At what distance,measured from the center of the sphere,does the electric field reach a value equal to half its maximum value?

A very large sheet of a conductor carries a uniform charge density of on its surfaces.What is the electric field strength 3.00 mm outside the surface of the conductor?

A charge of 1.0 × 10^-6 μC is located inside a sphere,1.25 cm from its center.What is the electric flux through the sphere due to this charge?

The figure shows four Gaussian surfaces surrounding a distribution of charges. (a)Which Gaussian surfaces have an electric flux of +q/ε₀ through them? (b)Which Gaussian surfaces have no electric flux through them?

Consider a spherical Gaussian surface of radius R centered at the origin.A charge Q is placed inside the sphere.To maximize the magnitude of the flux of the electric field through the Gaussian surface,the charge should be located

Two extremely large nonconducting horizontal sheets each carry uniform charge density on the surfaces facing each other.The upper sheet carries .The electric field midway between the sheets is pointing downward.What is the surface charge density on the lower sheet?

Exam 22: Gausss Law

At a distance D from a very long (essentially infinite) uniform line of charge,the electric field strength is 1000 N/C.At what distance from the line will the field strength to be 2000 N/C?

If a rectangular area is rotated in a uniform electric field from the position where the maximum electric flux goes through it to an orientation where only half the flux goes through it,what has been the angle of rotation?

If the electric flux through a closed surface is zero,the electric field at points on that surface must be zero.

A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume.At a radial distance from the center,the electric field has a magnitude E0.What is the magnitude of the electric field at a radial distance ?

Under electrostatic conditions,the electric field just outside the surface of any charged conductor

A hollow conducting spherical shell has radii of 0.80 m and 1.20 m,as shown in the figure.The sphere carries an excess charge of .A point charge of is present at the center.The surface charge density on the inner spherical surface is closest to

As shown in the figure,a square insulating slab 5.0 mm thick measuring has a charge of distributed uniformly throughout its volume.Use Gauss's law to determine the electric field at point P,which is located within the slab beneath its center,1.0 mm from one of the faces.

An irregular conductor carries a surface charge density of -6.75 µC/m2 at and in the vicinity of a point P on the surface.An electron is released just above P outside the conductor.What are the magnitude and direction of its acceleration the instant after it is released? , ,

Four dipoles,each consisting of a +10-µC charge and a -10-µC charge,are located in the xy-plane with their centers 1.0 mm from the origin,as shown.A sphere passes through the dipoles,as shown in the figure.What is the electric flux through the sphere due to these dipoles?

A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume.At what distance,measured from the center of the sphere,does the electric field reach a value equal to half its maximum value?

A very large sheet of a conductor carries a uniform charge density of on its surfaces.What is the electric field strength 3.00 mm outside the surface of the conductor?

A charge of 1.0 × 10-6 μC is located inside a sphere,1.25 cm from its center.What is the electric flux through the sphere due to this charge?

The figure shows four Gaussian surfaces surrounding a distribution of charges. (a)Which Gaussian surfaces have an electric flux of +q/ε0 through them? (b)Which Gaussian surfaces have no electric flux through them?

Consider a spherical Gaussian surface of radius R centered at the origin.A charge Q is placed inside the sphere.To maximize the magnitude of the flux of the electric field through the Gaussian surface,the charge should be located

Two extremely large nonconducting horizontal sheets each carry uniform charge density on the surfaces facing each other.The upper sheet carries .The electric field midway between the sheets is pointing downward.What is the surface charge density on the lower sheet?

A solid nonconducting sphere of radius R carries a uniform charge density throughout its volume.At a radial distance from the center,the electric field has a magnitude E₀.What is the magnitude of the electric field at a radial distance ?

An irregular conductor carries a surface charge density of -6.75 µC/m² at and in the vicinity of a point P on the surface.An electron is released just above P outside the conductor.What are the magnitude and direction of its acceleration the instant after it is released? , ,

A charge of 1.0 × 10^-6 μC is located inside a sphere,1.25 cm from its center.What is the electric flux through the sphere due to this charge?

The figure shows four Gaussian surfaces surrounding a distribution of charges. (a)Which Gaussian surfaces have an electric flux of +q/ε₀ through them? (b)Which Gaussian surfaces have no electric flux through them?