Download NS2-M3C20_-_Basic_Electricity_Exam

NS2-M3C20 - Basic Electricity (Exam)
Page 1
Name:______________________________
Date:_______________________________
1
Under most conditions, what charge will an atom carry?
A
B
C
D
2
What is the charge for each of the following?
·neutron ·proton ·electron
A
B
C
3
B
C
metal
water
glass
rubber
When heating two unlike metals to produce voltage, what determines the amount created?
A
B
C
6
It picks up extra electrons from the carpet; it is then attracted to the positive
charges in the wall.
It picks up extra electrons from the carpet; it is then attracted to the
negative charges in the wall.
It picks up extra protons from the carpet; it is then attracted to the negative
charges in the wall.
Which of the following would be an insulator? (Input all that apply, then push the ENTER
button.)
A
B
C
D
5
neutron: negative; proton: positive; electron: none
neutron: negative; proton: none; electron: positive
neutron: none; proton: positive; electron: negative
Why does a balloon stick to the wall after it is rubbed on carpet?
A
4
negative
positive
It will not carry a charge
Both A & B
The difference in temperature of the two metals.
The total length of the metal.
The number of protons in the conductor.
One or more cells assembled in a common container to act as a source of electrical power
A
B
C
D
Battery
Dry cell
Fuel cell
Wet cell
NS2-M3C20 - Basic Electricity (Exam)
7
Involving, relating to, or using any of various electrical effects due to the interaction of
radiation with matter
A
B
C
D
8
Change “lower” to “higher”
Change “hotter” to “wider”
Change “higher” to “lower”
The statement is correct as is.
A material's opposition to the flow of electric current
A
B
C
11
wood
silver
water
They all offer resistance
Read the following sentence and decide which of the options (A-D) is correct.
There are several factors that affect the amount of electricity flow. For example, the longer
a wire is the higher its resistance, or the hotter a wire is the lower its resistance.
A
B
C
D
10
Photoelectric
Battery
Photo cell
Thermocouple
Which of the following materials offers no resistance to electric current flow?
A
B
C
D
9
Page 2
Resistance
Battery
Voltage
You have an electrical circuit with 3 ohms of resistance and a current of 6 amperes. How
much voltage is in this circuit?
A
B
C
D
5 volts
18 volts
12 volts
1.5 volts
NS2-M3C20 - Basic Electricity (Exam)
12
What unit of measurement is used to measure the amount of resistance in an electrical
circuit?
A
B
C
D
13
D
B
C
D
The current in a circuit is inversely proportional to the applied voltage and
inversely proportional to the circuit resistance.
The current in a circuit is directly proportional to the applied voltage and
inversely proportional to the circuit resistance.
The current in a circuit is directly proportional to the circuit resistance and
inversely proportional to the applied voltage.
None of the above
Electric current that periodically reverses direction is known as what?
A
B
C
D
16
An electrically charged atom or group of atoms.
An electrical device that uses electrical current to do work.
The measure of the rate of flow of electrons past a given point in an electric
conductor such as a power line.
Materials that permit the free flow of electrons from atom to atom.
Which of the following defines "Ohm's Law"?
A
15
An ohmmeter
A watt
An ammeter
An ohm
Which of the following is the best definition of the term Conductor?
A
B
C
14
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Switching current
Insulating current
Primary current
Alternating current
Onboard ship, one of the principal means of communications is via sound powered phones. Since this
system operates without electricity, how does the signal get transmitted through the wires to the next
operator?
A
Each headset contains a battery pack which allows the system to transmit the
signal.
B The sound waves of your voice squeeze a small crystal and create enough
electricity to transmit the signal to the hearer.
C The sound waves of your voice activate a small thermocouple which creates the
electrical signal.
D It operates on the same principle as two cans connected by a string.
E The circuit is always plugged into the ship’s electrical circuit; you just can’t see the
connection from the operating stations.
NS2-M3C20 - Basic Electricity (Exam)
17
The flow of electrical energy through a conductor is called
A
B
C
D
18
In order from highest to lowest, the best conductors of electricity are
A
B
C
19
copper, aluminum, and silver wire
silver, copper, and aluminum wire
copper, silver, and aluminum wire
Voltage produced from light dislodging electrons from their orbits is called
A
B
C
20
a unit of conductance
an electric charge
electric current, or electricity
a negative charge
photoelectric
thermocouple
Both A and B
When voltage is doubled, power is
A
B
C
D
tripled
doubled twice
doubled
halved
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NS2-M3C20 - Basic Electricity (Exam)
Answer Key: NS2-M3C20 - Basic Electricity (Exam)
Question:
1
2
3
4
5
6
7
8
9
10
11
12
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14
15
16
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19
20
Answer
C
C
A
CD
A
A
A
D
A
A
B
D
D
B
D
B
C
B
A
B