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WorksheetsElectricity Unit Review
Total questions: 26
Worksheet time: 13mins
Name
Class
Date
1.
According to the law of charge conservation, the total charge in the universe does not change. So...objects only become charged through the:
a)
Transfer of protons between object
b)
Transfer of electrons between objects
c)
Transfer of neutrons between objects
d)
Miracle of magic
2.
Which two subatomic particles are located within the nucleus of an atom:
a)
Protons and electrons
b)
Electrons and neutrons
c)
Protons and neutrons
d)
Positive and negative poles
3.
The overall charge of an atom's nucleus is:
a)
Positive
b)
Negative
c)
Neutral
d)
It depends on how many electrons are in the nucleus
4.
Which of the following is NOT true of an electrical force:
a)
It can only attract
b)
It can attract and repel
c)
It is a strong force
d)
It varies based on distance between the charged objects
5.
What is the relationship between charge size and electrical force? Hint: Think of q1 and q2 from Coulomb's Law.
a)
Directly proportional
b)
Inversely proportional
c)
No relationship
6.
The value of the electrical force constant (K) in Coulomb's Law is 9E9. The magnitude of this value proves that electrical forces are:
a)
Strong
b)
Weak
7.
True or False: In an electrically polarized object (wall), the net (total) charge does not change.
a)
True
b)
False
8.
According to Ohm's Law, I and V are:
a)
Inversely proportional
b)
Directly proportional
9.
According to Ohm's Law, I and R are:
a)
Directly proportional
b)
Inversely proportional
10.
The unit of measurement for resistance is:
a)
Ampere (A)
b)
Volt (V)
c)
Ohm (Ω)
11.
The unit of measurement for I is:
a)
Ampere (A)
b)
Volt (V)
c)
Ohm (Ω)
12.
The unit of measurement for V is:
a)
Ampere (A)
b)
Volt (V)
c)
Ohm (Ω)
13.
An example of a voltage source is a/an:
a)
Battery
b)
Wind turbine
c)
Coal burning power station
d)
All of these
14.
Electrons flowing through a circuit are provided by:
a)
The voltage source
b)
The resistors
c)
The wires
d)
The switch
15.
The "pressure" that moves electrons through a circuit is called:
a)
Resistance
b)
Voltage
c)
Electrical load
d)
Current
16.
Adding another branch to a parallel circuit ______________ the total current in the circuit.
a)
Increases
b)
Decreases
c)
Does not change
17.
An open circuit is:
a)
On
b)
Off
18.
True or False: If one device fails in a parallel circuit, the other devices function normally.
a)
True
b)
False
19.
In DC, electron drift is:
a)
Approximately the speed of light
b)
Approximately 1 cm/s
c)
0 cm/s
20.
In AC, electron drift is:
a)
Approximately the speed of light
b)
Approximately 1 cm/s
c)
0 cm/s
21.
DC is not used to transport electrical energy long distances due to:
a)
Inefficiency
b)
It being far more dangerous than AC
c)
The electrons never go anywhere and can't transfer the energy
d)
Edison's patent preventing Consumer's Energy from using it
22.
The box on the left would most likely be:
a)
Magnetized
b)
Not magnetized
23.
A magnetic domain contains:
a)
Clusters of aligned atoms
b)
Clusters of randomly oriented atoms
24.
This set up is an example of a/an:
a)
Parallel circuit
b)
Electromagnet
c)
Magnetic domain
d)
Series circuit
25.
According to the law of electric charges, two negatively charged objects:
a)
Repel
b)
Attract
26.
Adding another load (such as a light bulb) in a series circuit ______________ the total current in the circuit.
a)
Increases
b)
Decreases
c)
Does not change
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