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Quiz: Gauss Law and Electric Potential

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.
The electric flux Φ through a surface
a)
is the amount of electric field piercing the surface
b)
is the electric field multiplied by the area.
c)
does not depend on the area involved
d)
is the line integral of the electric field around the edge of the surface
2.
Charge Q is distributed uniformly throughout a spherical insulating shell. The net electric flux through the inner surface of the shell is: 
a)
0
b)
Q/e0
c)
2Q/e0
d)
Q/4*Pi*e0
3.
The area vector for a flat surface
a)
is parallel to the surface and has a magnitude equal to the length of a side of the surface.
b)
is perpendicular to the surface and has a magnitude equal to the length of a side of the surface.
c)
is parallel to the surface and has a magnitude equal to the area of the surface.
d)
is perpendicular to the surface and has a magnitude equal to the area of the surface.
4.
When a piece of paper is held with one face perpendicular to a uniform electric field the flux through it is 25 N×m2/C. When the paper is turned 25° with respect to the field the flux through it is: 
a)
0 N×m2/C
b)
11 N×m2/C
c)
12 N×m2/C
d)
23 N×m2/C
5.
A physics instructor in an anteroom charges an electrostatic generator to 25 mC, then carries it into the lecture hall. The net electric flux through the lecture hall walls is: 
a)
0 N×m2/C
b)
25 x 10–6 N×m2/C
c)
2.2 x 105 N×m2/C
d)
2.8 x 109 N×m2/C
6.
A point particle with charge q is placed inside a cube but not at its center.  The electric flux through any one side of the cube:
a)
is zero
b)
is q/2ε0
c)
is q/4ε0
d)
is q/6ε0
7.

Electric field at a point inside the hollow spherical shell is

a)

1

b)

Kq/r2

c)

Kq/r3

d)

Zero

8.

Four charges are placed in three-dimensional space. The charges have magnitudes +3q, −q, +2q, and −7q. If a Gaussian surface encloses all the charges, what will be the electric flux through that surface?

a)

−13q/E0

b)

−3q/E0

c)

3q/E0

d)

13q/E0

9.

The figure below shows five Gaussian surfaces (F G/ .) surrounding a distribution of charges. Which surface has a flux of Q/E0

a)

a

b)

b

c)

c

d)

d

10.

The figure below shows a distribution of charges. The flux of the electric field due to these charges through the surface E is _____.

a)

0

b)

q/Eo

c)

2q/Eo

d)

3q/Eo

11.

The electric flux through a spherical Gaussian surface of radius R centered about an amount of charge Q is 1200 N/C m2. What is the electric flux through a cubic Gaussian surface of side R centered about the same charge Q?

a)

Less than 1200

b)

More than 1200

c)

Equal to 1200

d)

It cannot be determined with the given parameters

12.

Consider the four cases shown below. Each one contains either a charge q or a charge 2q. A Gaussian surface surrounds the charged particle in each case. Considering the electric flux through each of the Gaussian surfaces, which of the following comparative statements is correct

a)

1=3 less  than 2=4

b)

1=3 greater than 2=4

c)

1=2 less than 3=4

d)

3=4 greater than 2=3

13.

A point charge, +Q, is located on the x-axis at x = a, and second point charge, −Q, is located on the x- axis at X = −a. A Gaussian surface with radius R = 2a is centered at the origin. The flux through this Gaussian surface is ____.

a)

0

b)

2Q/ε0

c)

more than 0

d)

less than 0

14.

total flux over a closed surface is equal to

a)

1/ƹ0

b)

q/ƹ0

c)

kq/ƹ0

d)

zero

15.

The electric flux through the planar surface above ( positive unit normal to left ) is:

a)

Positive

b)

Negative

c)

Zero

16.
a)

positive (net outward flux)

b)

negative (net outward flux).

c)

positive (net inward flux)

d)

negative (net inward flux)

e)

zero

17.

What is the general equation for Electric Field?

a)

E=Fq0E=\frac{F}{q_0}

b)


E=kq1q2r2E=\frac{kq_1q_2}{r^2}

c)

E=F×q0E=F\times q_0

d)

E=λdsE=\lambda ds

18.

What is the relationship between Electric Flux and the charge enclosed?

a)

As the charge enclosed decreases, the flux increases.

b)

As the charge enclosed increases, the flux increases.

c)

There is no relationship.

d)

Flux is a constant, it never changes.

19.

What does Gauss Law take into consideration out of the following choices?

a)

Pressure

b)

Volume of a particle

c)

Measure of an enclosed charge

d)

Magnetism

20.

a)

A

b)

B

c)

C

d)

D