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Quiz von Kris Salmons, aktualisiert more than 1 year ago
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Erstellt von Kris Salmons
vor mehr als 6 Jahre
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Frage 1
Frage
The most commonly accepted theory regarding electricity says that an electric current is a flow of ____________________ through a conductor.
Antworten
-
Primordial aether
-
Neutrinos
-
Electrons
-
Protons
Frage 2
Frage
In the realm of electricity - as is also the case in pneumatics and hydraulics - current moves from a location of ____________ pressure to an area of ____________ pressure.
Antworten
-
low; high
-
high; low
-
negative; positive
-
equivalent; high
Frage 3
Frage
The name of the unit we use to describe our body weight is the pound. Likewise, the name of the unit we use to describe electrical pressure is the ____________.
Antworten
-
amp
-
volt
-
ohm
-
watt
Frage 4
Frage
The name of the unit we use to describe electrical current is the ____________.
Antworten
-
amp
-
volt
-
ohm
-
watt
Frage 5
Frage
The name of the unit we use to describe resistance against the flow of electrical current is the ____________.
Antworten
-
amp
-
volt
-
ohm
-
watt
Frage 6
Frage
All materials give at least some amount of resistance to the flow of electricity. However, the resistance given by some metals is very small and we say these metals are good ____________.
Antworten
-
insulators
-
semiconductors
-
conductors
-
heaters
Frage 7
Frage
There is a mathematical relationship between the voltage, current, and resistance in an electrical circuit. We express this relationship with the equation E = I x R. This relationship is called ____________ Law.
Antworten
-
Lenz's
-
Ohm's
-
Tesla's
-
Watt's
Frage 8
Frage
When a large number of free electrons collect on a piece of non-conductive material, creating an electric field which might attract hair and small bits of paper, we call this an example of ____________ electricity.
Antworten
-
static
-
current
-
neutral
-
kinetic
Frage 9
Frage
One pole of a small, permanent bar magnet, if it is left free to move, will point toward the north geographic pole of the earth. Which magnetic pole of the small magnet points to the earth's geographic north pole?
Antworten
-
North
-
South
-
East
-
West
Frage 10
Frage
Magnets have two poles, named north and south. Lines of magnetic flux connect these two poles, moving from one to the other and creating what we call a magnetic field. Outside of the magnet, we say that the lines of force move from ____________ to ____________.
Antworten
-
south; north
-
north; south
-
south; south
-
north; north
Frage 11
Frage
If two magnets are brought near to one another, with the ____________ poles facing each other, then the magnets will be attracted to one another.
Antworten
-
like
-
unlike
-
center
-
same
Frage 12
Frage
If two magnets are brought near to one another, with the ____________ poles facing each other, then the magnets will be repelled from one another.
Antworten
-
like
-
unlike
-
center
-
opposite
Frage 13
Frage
When a wire is forced to move through a magnetic field, what is created in the wire?
Antworten
-
electric current
-
light
-
aetheric vapors
-
matter
Frage 14
Frage
When electricity is forced to flow through a wire, what is created in the space around the wire?
Antworten
-
light
-
aetheric vapors
-
a magnetic field
-
matter
Frage 15
Frage
Michael Faraday is considered one of the most important pioneers in the development of electric generators and motors. One of his most significant contributions was the development of sliding electrical contacts which are called ____________.
Antworten
-
rollers
-
brushes
-
sliders
-
tectonic plates
Frage 16
Frage
When the number 1200 is written in the form 1.2 x 10^3 it still equals the same quantity; and this new form of notation is referred to as "____________ notation."
Antworten
-
abbreviated
-
engineering
-
short hand
-
imperial
Frage 17
Frage
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 1,500,000 V = 1.5 ___V.
Antworten
-
m
-
k
-
M
-
G
Frage 18
Frage
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 0.003 A = 3.0 ___A.
Antworten
-
m
-
k
-
M
-
G
Frage 19
Frage
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 2,200 Ω = 2.2 _____Ω.
Antworten
-
m
-
k
-
M
-
G
Frage 20
Frage
Name the unit we use to describe electrical "power."
Antworten
-
Coulomb
-
Steinmetz
-
Watts
-
Ohms
Frage 21
Frage
Name the unit we use to describe electrical "energy."
Antworten
-
Watt-hour
-
Watt-second
-
Amp-hour
-
Volt-amps
Frage 22
Frage
Semiconductors have 4 valence electrons in their outer shell. Conductors generally have ________________ 4 valence electrons in their outer shell.
Antworten
-
more than
-
fewer than
-
equal to
-
none of the above
Frage 23
Frage
Insulators are graded by their "dielectric strength," measured in volts per mil. This means that a dielectric with a V/mil of 500, and a thickness of 1 mil, can stand up to 500 volts of electrical pressure trying to force electrons to flow through it. The oxidized form of one very common conductor has an extremely high dielectric strength of 20,000 V/mil. This very non-conductive metal oxide is ________________ oxide.
Antworten
-
silver
-
copper
-
aluminum
-
iron
Frage 24
Frage
How does the resistance of a wire change as the wire is made longer?
Antworten
-
Resistance goes up.
-
Resistance goes down.
-
It doesn't change at all.
-
Cannot tell from the information given.
Frage 25
Frage
One of the most common forms of low-power fixed resistors is comprised of a conductive paste, coating a small ceramic tube, with metal end-caps and leads. This is called the ________________ film resistor.
Antworten
-
metal
-
silicon
-
carbon
-
aluminum
Frage 26
Frage
Most variable resistors have 3 leads: one lead from each end of the main resistor element and one lead from the movable conductor, called the wiper. There are 2 standard ways to wire a variable resistor into a circuit. One way involves tying the wiper lead to one of the end-leads. thus turning the variable resistor into a 2-lead component. This style is called a ________________ and it is used primarily for controlling electric current.
Antworten
-
potentiometer
-
rheostat
-
inductor
-
switch
Frage 27
Frage
Most variable resistors have 3 leads: one lead from each end of the main resistor element and one lead from the movable conductor, called the wiper. There are 2 standard ways to wire a variable resistor into a circuit. One way leaves it in the circuit as a 3-lead component, used primarily for controlling voltage. This style of variable resistor is called a ________________.
Antworten
-
potentiometer
-
rheostat
-
inductor
-
switch
Frage 28
Antworten
-
ground
-
battery
-
fuse
-
resistor
Frage 29
Frage
Name the component represented by this schematic symbol.
Antworten
-
ground
-
battery
-
fuse
-
resistor
Frage 30
Frage
A network of components and conductors arranged and interconnected to allow a controlled flow of electric current from the positive side of a voltage source, through a load, and back to the negative side of the source is called an electric ________________.
Antworten
-
maze
-
circuit
-
web
-
thread
Frage 31
Frage
Blue [blank_start]________________[blank_end]
Yellow [blank_start]________________[blank_end]
White [blank_start]________________[blank_end]
Orange [blank_start]________________[blank_end]
Brown [blank_start]________________[blank_end]
Violet [blank_start]________________[blank_end]
Black [blank_start]________________[blank_end]
Green [blank_start]________________[blank_end]
Gray [blank_start]________________[blank_end]
Red [blank_start]________________[blank_end]
Antworten
-
6 (six)
-
4 (four)
-
9 (nine)
-
3 (three)
-
1 (one)
-
7 (seven)
-
0 (zero)
-
5 (five)
-
8 (eight)
-
2 (two)
Frage 32
Frage
Ohm's Law is: ________________ = ________________ x ________________
Antworten
-
I = R x E
-
R = E x I
-
I = E x R
-
E = I x R
Frage 33
Frage
Using the series circuit shown, if V = 10V and R = 100Ω, how much current is flowing through the circuit?
Antworten
-
10.0 A
-
.001 A
-
.100 A
-
100 A
Frage 34
Frage
Using the series circuit shown, if R = 10Ω and I = 0.1A, what is the value for the supply voltage?
Antworten
-
1.0V
-
0.1V
-
10V
-
0.01V
Frage 35
Frage
Using the series circuit shown, if V = 100V and I = 0.1A, what is the total resistance?
Antworten
-
10Ω
-
100Ω
-
1,000Ω
-
10,000Ω
Frage 36
Frage
When a meter is placed into a circuit to take measurements, it always draws off some amount of current, be it ever so small. This impact that a meter has on a circuit is referred to as meter _________________.
Antworten
-
loading
-
mistake
-
unloading
-
parallax
Frage 37
Frage
In the series circuit shown, which meter is correctly positioned for measuring voltage?
Image:
Q38 39 (binary/octet-stream)
Antworten
-
Meter 1
-
Meter 2
Frage 38
Frage
In the series circuit shown, which meter is correctly installed for measuring current?
Image:
Q38 39 (binary/octet-stream)
Antworten
-
Meter 1
-
Meter 2
Frage 39
Frage
The most used "reference" point when measuring voltages in electrical and electronic circuits is also an electrically "common" point in the circuit that is generally tied to one side of the voltage source. This point is commonly called __________________.
Antworten
-
source
-
ground
-
test
-
hot
Frage 40
Frage
20 kΩ equal ___________.
Antworten
-
2,000Ω
-
20,000Ω
-
200,000Ω
-
2,000,000Ω
Frage 41
Frage
Energy that is being stored for possible use is technically or scientifically known as ________________ energy.
Antworten
-
potential
-
quantum
-
kinetic
-
static
Frage 42
Frage
Energy that is in motion, performing work in the moment is technically or scientifically known as _____________________ energy.
Antworten
-
quantum
-
potential
-
kinetic
-
static
Frage 43
Frage
1 Watt = 1 Volt x 1 ___________
Antworten
-
Hour
-
Amp
-
Ohm
-
Farad
Frage 44
Frage
In electricity, power may be calculated as Watts = I^2 x _________.
Antworten
-
V
-
R
-
P
-
A
Frage 45
Frage
In a circuit with a source voltage of 120V, the voltage drop across a short circuit equals __________.
Antworten
-
120V
-
0V
-
infinite volts
-
unknown
Frage 46
Frage
1 HP = about 750 _____________.
Antworten
-
Amps
-
Watts
-
Ohms
-
Volts
Frage 47
Frage
In a circuit with a source voltage of 120V, the voltage drop across an open circuit equals ____________.
Antworten
-
120V
-
0V
-
infinite volts
-
unknown
Frage 48
Frage
A series circuit has ______________ path(s) for current to follow.
Antworten
-
no
-
one
-
multiple
-
variable
Frage 49
Frage
If current is measured in two different parts of a series circuit, the two measurements will be __________________.
Antworten
-
the same
-
proportional to the resistors
-
slightly different
-
unknown
Frage 50
Frage
In a series circuit, consisting of one voltage source and three resistors, the sum of all the voltage drops across the three resistors will be equal to _________________.
Antworten
-
100 volts
-
the source voltage
-
a single resistor's ohms
-
unknown
Frage 51
Frage
In a series circuit, consisting of one voltage source and three resistors, if the resistance of one of the resistors is increased the voltage drop across it will ____________________________.
Antworten
-
also increase
-
decrease
-
remain the same
-
change unpredictably
Frage 52
Frage
In a series circuit consisting of one voltage source and two resistors, if the values of the resistors are equal we can assume that their voltage drops will be __________________.
Antworten
-
equal to each other
-
greater than the total supply voltage
-
higher across the first resistor
-
higher across the second resistor
Frage 53
Frage
How much current is flowing through the series circuit shown?
Antworten
-
0.5mA
-
5.0mA
-
5.0µA
-
5.0A
Frage 54
Frage
What is the voltage drop across the 5kΩ resistor in the series circuit shown?
Antworten
-
12V
-
25V
-
2.5V
-
0.5V
Frage 55
Frage
What is the voltage of the second battery in the series circuit shown?
Image:
Q58 59 (binary/octet-stream)
Antworten
-
12V
-
20V
-
24V
-
36V
Frage 56
Antworten
-
6A
-
6mA
-
6µA
-
none of these
Frage 57
Frage
In the series circuit shown, if V = 24V, I = 2.4mA, and R1 = 3.5kΩ what is the value of R2?
Antworten
-
10kΩ
-
6.5kΩ
-
6.5Ω
-
10Ω
Frage 58
Frage
In a parallel resistor circuit, the voltage drop is ________________________ across all the resistors in the parallel network.
Antworten
-
equal
-
divided proportionally according to the resistor value
-
unpredictable
Frage 59
Frage
In a parallel resistor circuit, if all the resistors are of the same value the current is __________________ through each of the resistors.
Antworten
-
the same
-
greater through the first branch resistor
-
greater through the second branch resistor
-
undeterminable
Frage 60
Frage
In a parallel resistor circuit, if all the resistors are of different values the branch with the smallest resistor value will have the _________________ current flow.
Antworten
-
greatest
-
least
-
same
-
uncalculable
Frage 61
Frage
Total resistance in a parallel circuit is always _______________ the smallest resistor value.
Antworten
-
greater than
-
less than
-
equal to
-
unrelated to
Frage 62
Frage
Two 100Ω resistors are connected in parallel. What is their combined resistance?
Antworten
-
50Ω
-
75Ω
-
100Ω
-
200Ω
Frage 63
Frage
In the parallel circuit shown, if V=6V, R1=200Ω, and R2=500Ω what is the total resistance?
Antworten
-
143Ω
-
200Ω
-
500Ω
-
700Ω
Frage 64
Frage
In the parallel circuit shown, if V=6V, R1=200Ω, and R2=500Ω what is the total current?
Antworten
-
42mA
-
4.2µA
-
0.42A
-
8.5mA
Frage 65
Frage
What is the total resistance of this series-parallel circuit?
Antworten
-
1660Ω
-
880Ω
-
460Ω
-
1000Ω
Frage 66
Frage
When electric current flows through a coil of wire it transforms the coil into a "temporary" device which is called a(n) ____________________.
Antworten
-
bipolar rectifier
-
solenoidal toroid
-
electromagnet
-
diode
Frage 67
Frage
As a wound coil is stretched out longer (like stretching a slinky) the intensity of its magnetic field _________________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined without additional information
Frage 68
Frage
The type of electrical generator which puts out AC is called a(n) ___________________.
Antworten
-
buck-boost generator
-
PWM dynamo
-
alternator
-
there is no such thing
Frage 69
Frage
The time required to complete one full alternating sine wave of AC is called the ___________________ of the waveform.
Antworten
-
frequency
-
period
-
amplitude
-
window
Frage 70
Frage
The number of complete waveforms that occur in a single second of time is called the _________________ of the waveform.
Antworten
-
frequency
-
period
-
amplitude
-
window
Frage 71
Frage
What is the unit we use to describe "cycles per second"?
Antworten
-
Hurts
-
Hertz
-
Henries
-
Hours
Frage 72
Frage
A _________________ is a device that combines an electromagnet with one or more sets of switch contacts.
Antworten
-
contactor
-
relay
-
both of these
Frage 73
Frage
A coil with a moving armature, used to create short-stroke linear motion, is called a _____________________.
Antworten
-
contactor
-
solenoid
-
electromagnet
-
relay
Frage 74
Frage
When a relay is not energized, what resistance should you read across the NC (normally-closed) contacts?
Antworten
-
1000Ω
-
0Ω
-
infinite ohms
-
cannot determine without additional information
Frage 75
Frage
If the frequency of an AC signal increases, the time of a single wave cycle __________________.
Antworten
-
increases
-
decreases
-
does not change
-
cannot be determined
Frage 76
Frage
What is the more informal and physically descriptive name of the electrical component we call the inductor?
Antworten
-
plug
-
core
-
coil
-
wheel
Frage 77
Frage
Inductance gives opposition to any change in circuit _________________.
Antworten
-
resistance
-
voltage
-
current
-
power
Frage 78
Frage
When an inductor is first being energized with a DC current, the opposition to current changes is in the form of "back __________."
Antworten
-
track
-
EMF
-
resistance
-
power
Frage 79
Frage
When an inductor is quickly removed from a power source, a forward voltage comes out of the coil which can be very high. This is commonly called __________ ___________ voltage.
Antworten
-
high power
-
low ohms
-
kick back
-
feed back
Frage 80
Frage
The variable used to designate "inductance" in an equation is the letter __________.
Antworten
-
B
-
K
-
L
-
C
Frage 81
Frage
The primary unit with which we quantify inductance is the _________________.
Antworten
-
Gauss
-
Henry
-
Oersted
-
Farad
Frage 82
Frage
As an inductor is stretched out longer (like a slinky) its inductance _______________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information given
Frage 83
Frage
When a permeable core material is added to a hollow inductor, its inductance ______________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information provided
Frage 84
Frage
If we reduce the number of turns of wire in an inductor its inductance _________________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined from the given information
Frage 85
Frage
A transformer has 10 turns in its primary side and 40 turns in its secondary side. If 60VAC is applied to the primary the voltage measured across the secondary will be __________________.
Antworten
-
30VAC
-
120VAC
-
240VAC
-
480VAC
Frage 86
Frage
The name of the unit used to describe the quantity of capacitance in a capacitor is the _______________.
Antworten
-
Henry
-
Farad
-
Tesla
-
Gauss
Frage 87
Frage
As the common surface area of a capacitor's plates increases, the capacitance ______________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined without additional information
Frage 88
Frage
As the dielectric thickness of capacitors increases, separating the plates further apart, the capacitance ______________.
Antworten
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information provided
Frage 89
Frage
Which has a higher dielectric constant?
Antworten
-
air
-
ceramic
-
aluminum
-
mica
Frage 90
Frage
Capacitors effectively block _______________ current but appear to allow ________________ current to pass through.
Antworten
-
direct; alternating
-
alternating; direct
-
variable; direct
-
direct; constant
Frage 91
Frage
CT = C1 + C2 + C3 + ... + Cn is the formula used to calculate total capacitance for capacitors connected in _______________.
Antworten
-
series
-
parallel
-
individually
-
no circuit configuration
Frage 92
Frage
For the image shown, what is the peak-to-peak voltage?
Antworten
-
5V
-
14V
-
20V
-
27.5V
Frage 93
Antworten
-
5V
-
14V
-
20V
-
27.5V
Frage 94
Frage
In the image shown, what is the period of the waveform?
Antworten
-
200µs
-
600µs
-
1ms
-
2ms
Frage 95
Frage
In the image shown, what is the frequency for the waveform?
Antworten
-
100Hz
-
500Hz
-
1,000Hz
-
5,000Hz
Frage 96
Frage
In the image shown, what is the RMS voltage for the sine wave?
Antworten
-
5V
-
7.07V
-
9.75V
-
14.14V
Frage 97
Frage
A transformer has a 4 : 1 turns ratio. If the secondary voltage is 10V and secondary power is 40W, what is the primary current?
Antworten
-
1mA
-
1A
-
4A
-
8A
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