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WorksheetsElectrostatic Charges and Coulomb's Law
Total questions: 40
Worksheet time: 18mins
Name
Class
Date
1.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
2.
Positive ions form when atoms _________ valence electrons.
a)
lose
b)
gain
c)
share
d)
gain or share
3.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
4.
What charge does an atom have if it LOSES an electron?
a)
Positive (+)
b)
Negative (-)
5.
Ions are:
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
6.
What charge does an atom have if it GAINS an electrons?
a)
Positive (+)
b)
Negative (-)
7.
A positive ion is called a
a)
cation
b)
anion
8.
A anion will be a ____ ion.
a)
negative
b)
positive
9.
What types of charges attract?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Positive and Negative
10.
Walking across a carpet is an example of charge being transferred by
a)
friction.
b)
induction.
c)
contact.
d)
static electricity
11.
Electric charges that are alike _______ each other.
a)
Attract
b)
Repel
12.
The teacher rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?
a)
The balloons will repel each other.
b)
The balloons will attract each other.
c)
The balloons will become positively (+) charged.
d)
The balloons will pop.
13.
What charge does an electron have?
a)
negative (-)
b)
positive (+)
c)
neutral or no charge (0)
14.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
15.
True or False, Lighting is a form of static electricity.
a)
True
b)
False
16.
What makes a charged balloon stick to the wall?
a)
Protons transferred to the balloon when it was rubbed on metal.
b)
Extra electrons on the surface of the balloon push away electrons in the wall, leaving a positively charged area.
c)
The rubber in the balloon has a magnetic field that pulls on the wood in the wall.
d)
Electricity in the balloon creates a magnetic field that attracts the metal in the wall.
17.
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)
our finger becomes negatively charged
18.
The net force due to different charges around a single charge can be determined using superposition principle. True or False?
a)
True
b)
False
19.
According to Coulomb's Law, The greater the separation distance between two charges the greater the magnitude of the electric force. True or False?
a)
True
b)
False
20.
Coulomb's Law states that the electric force is directly proportional to the product of the two charges and inversely proportional to the distance between them. True or False?
a)
True
b)
False
c)
not enough information
21.
The mass of a single electron is equal to 9.109x10-31C. True or False?
a)
True
b)
False
22.
The separation distance between two charges is equal to r=√(k.(q1q2/Fe)). True of False
a)
True
b)
False
23.
Electric field is directly proportional to the charge and inversely proportional to the magnitude of electric force. True or False?
a)
True
b)
False
24.
The electric field lines for a positive charge is always directed away from the charge. True or False?
a)
True
b)
False
25.
Electric force is also equal to the electric field multiply with a charge. True or False?
a)
True
b)
False
26.
The S.I. unit for electric field is__________?
a)
nC
b)
μC
c)
n/C
d)
N/m
e)
none of the above
27.
In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?
a)
Right
b)
Left
c)
Up
d)
Down
28.
Which quantity and unit are correctly paired?
a)
electric field strength and N/C
b)
electricity and Coulombs
c)
electrostatic force and electrons
d)
electric field strength and E
29.
A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?
a)
4 N
b)
100 N
c)
40 N
d)
10 N
30.
Which of the following statements is false about electric field lines
a)
electric field lines cannot cross
b)
electric field lines point away from positive charge
c)
electric field lines are always straight lines
d)
electric field lines show how a proton would move in an electric field
31.
At which point is the electric field the strongest
a)
A
b)
B
c)
C
d)
D
32.
At which point is the electric field the weakest?
a)
A because it is the furthest away
b)
A because the field lines are further apart
c)
C because the field lines are further apart
d)
C because it is the furthest away
33.
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
a)
+,+
b)
+,-
c)
-,+
d)
-,-
34.
Consider the electric field lines drawn at the right for a configuration of two charges. Several locations are labeled on the diagram. Which of these shows the ranking in order of weakest to strongest correctly
a)
A, E, C
b)
D, E, C
c)
D, B, A
d)
A, D, B
35.
An electrostatic force of 2 X 102. newtons is exerted on a charge of 4 coulomb at point P in an electric field. The magnitude of the electric field intensity at P is
a)
8 X 102 N/C
b)
5 N/C
c)
2 X 10-2 N/C
d)
50 N/C
36.
It is observed that Balloon A is charged negatively. Balloon B exerts a repulsive effect upon balloon A. Would the electric field vector created by balloon B be directed towards B or away from B and why?
a)
towards because electric field lines point away from negative charges
b)
towards because electric field lines point away from positive charges
c)
away because electric field lines point away from negative charges
d)
away because electric field lines point toward positive charges
37.
QA and QB are two charges creating an electric field. Based on the electric field lines, we can conclude
a)
QA and QB are both positive
b)
QA and QB are both negative
c)
QA is positive and QB is negative
d)
QA is negative and QB is positive
38.
Which of the following is a true statement about the electric field between the two plates?
a)
The field is attractive between the plates and uniform in strength
b)
The field is repulsive between the plates and uniform in strength
c)
The field is attractive between the plates and strongest near the positive
d)
The field is repulsive between the plates and strongest near the positive
39.
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
40.
What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10-25 newton?
a)
1.44 x 10-6 N/C
b)
3.68 x 106 N/C
c)
1.44 x 1044 N/C
d)
3.68 x 10-44 N/C
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