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Static Electricity and Coulomb's Law

Total questions: 50

Worksheet time: 2hrs 51mins

Name
Class
Date
1.
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
2.
What happens to the force between two charged objects if you triple the magnitude of one charge? 
a)
1/3X
b)
3X
c)
1/9X
d)
9X
3.
What variable do "Newtons" represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
4.
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
5.
The electrical force between charges is strongest when the charges are
a)
close together
b)
far apart
c)
 the electric force is constant everywhere.
d)
there is no pattern
6.
A material in which electrons are not able to move easily 
a)
Circuit 
b)
Insulator 
c)
Resistance 
d)
Conductor
7.
Which of these substances conducts electricity the best?
a)
wood
b)
brick
c)
copper
d)
plastic
8.

Which of the following best describes an electrostatic charge?

a)

the field surrounding Earth produced by its North and South poles

b)

a buildup or loss of electrons on an object, due to friction or induction

c)

the opposite sides of a magnet

d)

the force of gravity pulling objects to Earth

9.

Which of the following will repel one another?

a)

the North pole and South pole of a magnet

b)

a negatively-charged balloon and your positively-charged hair

c)

two positively-charged objects

d)

two objects that have the opposite charge

10.

Approximately how much force would be generated by two charged objects held 2 m apart, if q1 has a charge of 3.0 C and q2 has a charge of 4.0 C?

a)

0.5 N

b)

1.5 N

c)

3 N

d)

6 N

11.

A positively charged rod is touched to a pith ball. The pith ball will become positive due to the process of

a)

Induction

b)

Conduction

12.

A material through which charges will not move easily.

a)

Conductor

b)

Insulator

c)

Facilitators

d)

Plastics

13.

Two balloons are charged with an identical quantity and type of charge -6.25x10-9 C. They are held apart a distance of 0.6 m. Determine the magnitude of the electrical force of repulsion between them. k=9x109 (F=kq1q2/d2)

a)

9.8x10-7 N

b)

3.2x109 N

c)

5x10-2 N

14.

A student creates identical electrical charges on identical balloons by rubbing them with a wool cloth. The balloons repel each other. According to Coulomb's Law, which should the student do to increase the electrical force of repulsion between these balloons?

a)

Increase the distance between the balloons.

b)

Increase the charge on one of the balloons.

c)

Increase the masses of the balloons.

15.
What are the charged parts of an atom?
a)
proton and neutron
b)
proton and electron
c)
neutron and electron
d)
proton, neutron, and electron
16.
What is The Law of Electrostatic Attraction (Coulomb's Law)?
a)
The strength of the force is determined by the size of the charge.
b)
Electric charge can neither be created nor destroyed
c)
There is an opposite and equal force to all charges
d)
Electric charge is transferred and transformed
17.
an object or type of material that allows the flow of an electrical current in one or more directions.
a)
conductor
b)
insulator
c)
spark
d)
grounding
18.
two objects with the same charge will move away from each other
a)
attraction
b)
repel (repulsion)
c)
conduct
d)
insulate
19.
the charging of an object through rubbing.
a)
friction
b)
induction
c)
conduction
d)
neutralization
20.
What is static electricity caused by?
a)
A balance of power
b)
A balance of positive and negative charges
c)
. An imbalance of positive and negative charges
d)
An imbalance of protons and neutrons
21.
Which of these materials is an insulator?
a)
Aluminum Paper
b)
Wool Sweater
c)
Copper Wire
d)
Silver Coin
22.
What can you infer about any object that gives you a static shock when you touch it?
a)
. It's a conductor
b)
 It's an insulator
c)
It's negatively charged
d)
 It's positively charged
23.
What happens when you touch a metal doorknob after rubbing your shoes on the carpet?
a)
 The doorknob sends a burst of electric current into your body
b)
 Millions of electrons go from your finger into the doorknob
c)
The doorknob sends millions of electrons into your finger
d)
Your finger becomes negatively charged
24.
The negatively charged particles in an atom are called _____.
a)
electrons
b)
neutrons
c)
negatrons
d)
protons
25.
If two objects with static charge are attracted, what do you know about them?
a)
They are both positively charged.
b)
They are both negatively charged.
c)
One is positively charged and one is negatively charged, but you won't be able to tell which is which.
d)
One is positively charged and one is negatively charged, and you can tell which is which by looking at them.
26.
Which part of Coulomb's Law is always squared?
a)
distance
b)
charge
c)
Coulomb's constant
d)
force
27.
Kamal walked across a carpet on a dry winter day. The results are illustrated in this drawing.
What happened to Kamal’s shoes and the carpet?
a)
Both the shoes and the carpet lost electrons
b)
Both the shoes and the carpet gained electrons
c)
The shoes gained electrons and the carpet lost electrons
d)
The shoes lost electrons and the carpet gained electrons
28.
Hector walks across the classroom carpet on a cold day. When he reaches for the doorknob, he feels a small electric shock.
   

Which of the following statements is true?
a)
Hector’s hand has no charge
b)
Hector’s hand has a neutral charge
c)
Hector’s hand has a positive charge
d)
Hector’s hand has a negative charge
29.
What charge does a proton have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
30.

Which two particles are attracted to each other?

a)

Two neutrons

b)

A proton and an electron

c)

Two protons

d)

An electron and a neutron

31.

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

32.

As two oppositely charged particles approach each other, what happens to the electrical force between them?

a)

The attractive force increases

b)

The magnitude of the electric force decreases

c)

The repulsive force increases

d)

The magnitude of their charges increases

33.

A balloon is rubbed on a student's head. What occurs because of this?

a)

Charged particles on the balloon are destroyed

b)

Positively charged particles move from head to balloon

c)

Charged particles from the balloon are released into the air

d)

Negatively charged particles move from head to balloon

34.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
35.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
36.

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

a)

k = 9·10-9

b)

k = 9.8

c)

k = 6.67·10-11

d)

k = 9 ·109

37.
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
38.
In a good insulator, electrons are usually
a)
free to move around
b)
free to move around after an impurity has been added
c)
semi-free to move around
d)
tightly bound in place
39.
What variable is a Coulomb the unit for?
a)
Charge
b)
Force
c)
Distance
d)
Mass
40.
In a neutral atom, the number of electrons is equal to the number of _______.
a)
Neutrons
b)
Orbits
c)
Protons
d)
subatomic particles
41.
If two charges repel each other, the two charges must be
a)
Positive and neutra
b)
Positive and negative
c)
positive and neutral
d)
negative and negative
42.
An object becomes charged when the atoms in the object gain or lose
a)
electrons
b)
protons
c)
neutrons
d)
all of the above
43.
If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
a)
friction destroyed electrons in the rod.
b)
the silk has become negatively charged.
c)
protons have moved to the rod.
d)
glass attracts more protons.
44.
If you bring a charged object near an electrically neutral surface without allowing the object to touch the surface, the charges in the surface are rearranged by
a)
friction.
b)
convection.
c)
induction.
d)
conduction.
45.
Objects that have opposite charges
a)
are attracted to each other, and the force between the objects pulls them together.
b)
are attracted to each other, and the force between the objects pushes them apart.
c)
are repelled by each other, and the force between the objects pulls them together.
d)
are repelled by each other, and the force between the objects pushes them apart.  
46.
A region around a charged particle that can exert a force on another charged particle is called an
a)
electric pulse.
b)
electric charge.
c)
electric force.
d)
electric field.
47.
Charging by ____ occurs when electrons are transferred from one object to another by direct contact.
a)
reduction
b)
induction
c)
conduction
d)
friction
48.
The "Q" in Coulomb's Law stands for
a)
the mass of charges objects.
b)
the distance of charged objects.
c)
the force of charged objects.
d)
the charge of charged objects.
49.
Electric field lines are drawn
a)
In a radial direction, from negative to positive.
b)
In a radial direction, from positive to negative.
c)
In a tangent direction, from positive to negative.
d)
In a tangent direction, from negative to positive.
50.
Which part of Coulomb's Law is always squared?
a)
distance
b)
charge
c)
Coulomb's constant
d)
force

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