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WorksheetsElectricity Test Review
Total questions: 75
Worksheet time: 52mins
A 3 C charge and a -4 C charge will________________________.
Attract
Repel
Check the following answer choices where electric force will INCREASE.
When the charges get closer
If both of the charges get smaller (decrease).
If one of the charges is bigger (increases).
If the distance between the charges increases?
Electrical forces between charges depends on ...
protons and neutrons
distance and amount of charge
a strong nuclear force
when an object has equal number of protons and neutrons
Atomic nuclei of all elements consist of
protons and neutrons
protons and electrons
electrons and neutrons
protons, neutrons, electrons
A balloon is rubbed against hair. Afterwards it sticks to the wall. The balloon and wall are
oppositely charged
like charged
neutrally charged
If you have an atom with 2 protons and 4 electrons, what is the charge of the atom?
positive
negative
neutral
If an atom has 5 protons and 5 electrons, what is the charge of the atom?
positive
negative
neutral
Which of the following describes the term ground?
Moving electrons
A machine that separates charge.
Can accept or give an infinite amount of electrons. Will neutralize a charge.
When a spark jumps between two objects.
Which of the following phrases describes electricity?
a machine that separates charge.
when a spark jumps between two objects
causes an electric force and charges to move
moving electrons
If an object has a 4.5 C charge, is it positively or negatively charged?
positively
negatively
neutral
If an object has a charge of 4.5 C, did it gain or lose electrons?
gain
lose
neither
If an object has a charge of 4.5 C, and you touch it to the ground, will it lose electrons to the ground or will it gain electrons from the ground?
gain
lose
neither
What is the SI unit for charge?
Ampere
Watt
Voltage
Coulomb
What does the Strong Nuclear Force do?
It is the force that allows electrons to move.
It is the force that allows an object to have more protons than electrons.
It is the force that keeps protons bound in the nucleus of the atom.
It is the force that keeps electrons bound to a nucleus.
When an object is neutral, which of the following is true?
It has more protons that electrons.
It has equal number of protons and electrons.
It has more electrons than protons.
Protons, electrons, and neutrons are equal.
Which of the following describe electric force?
The unit for charge.
A push or pull caused by charges.
What keeps protons bound in the nucleus of an atom.
When an object has an equal number of electrons and neutrons.
Check the following that describe when an electric force will DECREASE.
If the distance between the charges increases.
If one of the charges is bigger (increases).
If both of the charges decrease (get smaller).
If the charges get closer.
What is meant by the term arcing?
When a spark jumps between two objects.
When an atom has a negative charge.
When electrons are lost.
When protons are gained.
A positive and negative charge will
attract
repel
Two positive charges will
attract
repel
Which of the following correctly identifies the circuits above?
A: parallel B: series
A: series B: parallel
A: series B: series
A: parallel B: parallel
Only one path for the electricity
series
parallel
How your house is wired
series
parallel
Can turn off one light without turning the others off
series
parallel
What happens to the current in a circuit as you increase the voltage?
it decreases
it increases
it stays the same
it goes away
The electric field lines for a positive charge is always directed away from the charge. True or False?
True
False
Which graph best represents the relationship between the strength of an electric field and distance from a point charge?
What is special about ionized air?
it can conduct electricity
it can glow in the dark
it can reduce humidity
it can trap electricity
Electrical field lines of a negatively charged object flow _______________.
Inwards
Outwards
Clockwise
Counter-Clockwise
Based on the arrangement of the electric field lines in the diagram, what are the charges?
both charges are the same
the charges are opposite
they are neutral; no charge
Which diagram correctly shows the field lines between two different charges?
A
B
Both
Neither
What is special about ionized air?
it can conduct electricity
it can repel electricity
it can glow in the dark
it can reduce humidity
Calculate the VOLTAGE through a load, if a resistance of 500 Ω that has a current of 1.4 A flowing through it.
70 V
357 V
.0028 V
700 V
A 3-V battery sends a current of 0.10 A through a light bulb. What is the resistance of the filament of the bulb?
.033 Ω
30 Ω
.3 Ω
300 Ω
A 10-V battery generates a current through a 5 Ω resistor. How much current does the battery generate?
2 A
50 A
2.5A
0.5
When the resistance in a circuit increases, what happens to the current?
Current Increases
Current Decreases
Current Remains the same
When the voltage in a circuit increases, what happens to the current?
Current Increases
Current Decreases
Current Remains the same
Which of the following would be a measurement of Current?
27 V
32 Ω
7 A
1.5 W
Which of the following would be a measurement of Resistance?
3 Ω
1.7 V
23 A
67 W
Which of the following would be a measurement of Voltage?
21 Watts
9 V
2.0 Amps
7 Ω
Which of the following is the correct formula for Calculating Current?
I = RV
R = V x I
I=VR
V= I x R
Which of the following is Ohm's Law?
Current is proportional to Voltage and inversely proportional to resistance.
Current is proportional to Resistance and inversely proportional to Voltage
Resistance, Current and Voltage are proportional to each other.
Which of the following is not a description of current?
flowing electrons
pushes electricity in circuits
measured in Amps
equals voltage divided by resistance
Which would be best compared to a dam?
current
voltage
resistance
force
What is the total voltage of these batteries?
0 V
3 V
1.5 V
no way to tell
What is the voltage of a circuit right before the battery?
the sum total of the battery voltage
half the amount of the total
the same as it was at the start
zero
Which will have more resistance?
insulator
conductor
Which of these two water towers would give the least voltage to a water circuit?
A
B
Which point has the highest voltage?
B
D
E
G
Which resistor is the better conductor?
150 Ohms
300 Ohms
1500 Ohms
30 Ohms
Which of the following does not describe voltage?
12 Ohms
12 volts
pushes electricity in circuits
given by a battery
Which of the following does not describe resistance?
does work in an electric circuit
measured in Ohms
slows down current in a circuit
flowing electrons
According to Coulomb's Law, when the distance increases, the electrostatic force ____________; we call this relationship ____________ proportional.
decreases; directly
decreases; inversely
increases; inversely
increases; directly
The Coulomb is the unit for:
Charge
Force
Distance
Mass
What happens to the force between two charged objects when you double the distance between them?
it doubles
it is cut in half
it quadruples
it is cut by 1/4
If one of the charges doubles, what happens to the force?
it doubles
it gets cut in half
it quadruples
it is cut by 1/4
What is the unit for electrostatic charge?
Coulombs
Newtons
Meters
Joules
Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.
increase
decrease
stay the same
first increase, then decrease
What would a negative value for Fe mean?
The particles are moving away from each other
The particles have the same charge
The particles have opposite charges
The particles are moving towards each other
Select all answer that apply:
What kinds of particles do Coulomb's Law apply to?
electrons
protons
neutrons
neutral atoms
A repulsive force exists between which two particles?
Two neutrons
An electron and a neutron
An electron and a proton
Two protons
The variable "r" in Coulomb's Law would have what units?
Joules
Coulombs
Newtons
Meters
Which is the value of the constant in Coulomb's equation?
ke = 9·10-9
ke = 9.8
ke = 6.67·10-11
ke = 9 ·109
What does "r" measure?
the distance between the two charged objects
the amount of charge carried by the objects
the amount of force between two charged objects
the constant value for forces between the objects
What does Fe stand for?
the electrostatic force
the symbol for iron
the constant for the charges
the charges of the particles
What will be the units of F (or Fe)?
Newtons
Meters
Coulombs
Joules
As the value of r increases, what happens to the value of F?
F increases
F decreases
F never changes, q does
Cannot know from the information
What does q measure?
the distance between the two charged objects
the amount of charge carried by the object
the amount of force between two charged objects
Why are there two q's in the equation?
because there are two charged objects
because there are protons and electrons
because the particles are moving away from each other
because the particles are moving towards each other
What can you do to increase the value of k?
increase the force
increase the distance
decrease the charge
nothing can be done to change the value of k; it is a constant
An attractive force exists between which two particles?
Two neutrons
An electron and a neutron
An electron and a proton
Two electrons
Electric charges exert which kind of force?
a field force
a contact force
a gravitational force
a frictional force
