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ES-1-2

Total questions: 41

Worksheet time: 1hrs 16mins

Name
Class
Date
1.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
2.
What variable is a Coulomb the unit for?
a)
Charge
b)
Force
c)
Distance
d)
Mass
3.
What variable do "Newtons" represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
4.
What happens to the force between two charged objects when you double the distance between them?
a)
2X
b)
1/2X
c)
4X
d)
1/4X
5.
What happens to the force between two charged objects if you double the distance between them and double the magnitude of one charge?
a)
4X
b)
6X
c)
1/2X
d)
1/6X
6.
If each of the charges doubles, what happens to the force?
a)
Quadruples
b)
Doubles
c)
Stays the same
d)
Reduced by half
7.
If the distance doubles, what happens to the force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
8.
Electrostatic force F is directly proportional to:
a)
r^2 (distance squared)
b)
q1
c)
q2
d)
both q1 and q2
9.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
10.
What variable do Coulombs represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
11.

The graph shows the relationship between the force of interaction and the magnitude of charge. What type of relationship is this?

a)

Direct

b)

Indirect

c)

Inverse

d)

Reverse

12.

Recap:

Coulomb’s law states that the force between two charged objects will __________ when the magnitude of the object’s charge increases.

Coulomb’s law also states that the force between two charged objects will __________ when the distance between objects increases.

a)

increase; increase

b)

increase; decrease

c)

decrease; increase

d)

decrease; decrease

13.
A material in which electrons are not able to move easily 
a)
Circuit 
b)
Insulator 
c)
Resistance 
d)
Conductor
14.
Which of these substances conducts electricity the best?
a)
wood
b)
brick
c)
copper
d)
plastic
15.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
16.

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

a)

4.8 N

b)

1.2 N

c)

.6 N

d)

.3 N

17.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
18.

What happens to the force between two charged objects when you double the distance between them?

a)

it doubles

b)

it is cut in half

c)

it quadruples

d)

it is cut by 1/4

19.

If one of the charges doubles, what happens to the force?

a)

it doubles

b)

it gets cut in half

c)

it quadruples

d)

it is cut by 1/4

20.

What would a negative value for Fe mean?

a)

The particles are moving away from each other

b)

The particles have the same charge

c)

The particles have opposite charges

d)

The particles are moving towards each other

21.

Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.

a)

increase

b)

decrease

c)

stay the same

d)

first increase, then decrease

22.

Select all answer that apply:


What kinds of particles do Coulomb's Law apply to?

a)

electrons

b)

protons

c)

neutrons

d)

neutral atoms

23.

A repulsive force exists between which two particles?

a)

Two neutrons

b)

An electron and a neutron

c)

An electron and a proton

d)

Two protons

24.

The variable "r" in Coulomb's Law would have what units?

a)

Joules

b)

Coulombs

c)

Newtons

d)

Meters

25.

Which is the value of the constant in Coulomb's equation?

a)

ke = 9·10-9

b)

ke = 9.8

c)

ke = 6.67·10-11

d)

ke = 9 ·109

26.

What does Fe stand for?

a)

the electrostatic force

b)

the symbol for iron

c)

the constant for the charges

d)

the charges of the particles

27.

What does "r" measure?

a)

the distance between the two charged objects

b)

the amount of charge carried by the objects

c)

the amount of force between two charged objects

d)

the constant value for forces between the objects

28.

What can you do to increase the value of k?

a)

increase the force

b)

increase the distance

c)

decrease the charge

d)

nothing can be done to change the value of k; it is a constant

29.

A 5 C and 8 C are 8 m apart. What is the force between them?

a)

5.625 x 109

b)

5.625 x 10-9

c)

4.5 x 1010

d)

4.5 x 10-10

30.

A 5 C and 8 C charge give off a force of 2.5 x 109 N. What is the distance between them?

a)

11 m

b)

12 m

c)

121 m

d)

144 m

31.

Two charges of equal magnitude give off a force of -441000 N when they are 1000 m away from each other. What are the charges magnitude?

a)

5

b)

7

c)

9

d)

11

32.

Select Multiple Answers.


A negative force between two charges mean they:

a)

Attract

b)

Repel

c)

Are the same sign

d)

Are opposite signs

33.

A charge of 4 C and -7 C are 200 m apart. What is the force between them?

a)

6.3 x 106

b)

-6.3 x 106

c)

2.52 x 1011

d)

-2.52 x 1011

34.
Find the magnitude of the force between two charges of 1.0 C each which are 1.0 meter apart?
a)
9E-9 N
b)
9E9 N
c)
1.1E10 N
d)
1.1E-10 N
35.
Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
a)
-1.5E-11 N
b)
2.5E-11 N
c)
-2.5E11 N
d)
-7.5E-10 N
36.
If the distance doubles, what happens to the force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
37.
If the distance is reduced by half, what happens to the force?
a)
Quadruples
b)
Doubles
c)
Triples
d)
Reduces by half
38.

A point charge of +3.0 X 10-7 coulomb is placed 2.0 X 10-2 meter from a second point charge of +4.0 X 10-7 coulomb. What is the magnitude of the electrostatic force on the charges?

a)

6.0 X 10-12 N

b)

3.0 X 10-10 N

c)

5.4 X 10-2 N

d)

2.7 N

39.
What is the magnitude of the electrostatic force that a charge of +3.0 X 10-5 coulomb exerts on a charge of +6.0 X 10-6 coulomb that is 0.30 meter away?
a)
1.8 X 10-3 N
b)
5.4 X 10-2 N
c)
5.4 X 100 N
d)
1.8 X 101 N
40.

What direction will the charge in the middle move?

a)

to the right

b)

to the left

c)

stay still

d)

it's a mystery

41.

What direction will the charge in the middle move?

a)

to the right

b)

to the left

c)

stay still

d)

it's a mystery

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