11394041
Descrição
Quiz por Kris Salmons, atualizado more than 1 year ago
|
Criado por Kris Salmons
aproximadamente 7 anos atrás
|
|
Questão 1
Questão
The most commonly accepted theory regarding electricity says that an electric current is a flow of ____________________ through a conductor.
Responda
-
Primordial aether
-
Neutrinos
-
Electrons
-
Protons
Questão 2
Questão
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.
Responda
-
low; high
-
high; low
-
negative; positive
-
equivalent; high
Questão 3
Questão
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 ____________.
Responda
-
amp
-
volt
-
ohm
-
watt
Questão 4
Questão
The name of the unit we use to describe electrical current is the ____________.
Responda
-
amp
-
volt
-
ohm
-
watt
Questão 5
Questão
The name of the unit we use to describe resistance against the flow of electrical current is the ____________.
Responda
-
amp
-
volt
-
ohm
-
watt
Questão 6
Questão
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 ____________.
Responda
-
insulators
-
semiconductors
-
conductors
-
heaters
Questão 7
Questão
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.
Responda
-
Lenz's
-
Ohm's
-
Tesla's
-
Watt's
Questão 8
Questão
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.
Responda
-
static
-
current
-
neutral
-
kinetic
Questão 9
Questão
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?
Responda
-
North
-
South
-
East
-
West
Questão 10
Questão
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 ____________.
Responda
-
south; north
-
north; south
-
south; south
-
north; north
Questão 11
Questão
If two magnets are brought near to one another, with the ____________ poles facing each other, then the magnets will be attracted to one another.
Responda
-
like
-
unlike
-
center
-
same
Questão 12
Questão
If two magnets are brought near to one another, with the ____________ poles facing each other, then the magnets will be repelled from one another.
Responda
-
like
-
unlike
-
center
-
opposite
Questão 13
Questão
When a wire is forced to move through a magnetic field, what is created in the wire?
Responda
-
electric current
-
light
-
aetheric vapors
-
matter
Questão 14
Questão
When electricity is forced to flow through a wire, what is created in the space around the wire?
Responda
-
light
-
aetheric vapors
-
a magnetic field
-
matter
Questão 15
Questão
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 ____________.
Responda
-
rollers
-
brushes
-
sliders
-
tectonic plates
Questão 16
Questão
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."
Responda
-
abbreviated
-
engineering
-
short hand
-
imperial
Questão 17
Questão
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 1,500,000 V = 1.5 ___V.
Responda
-
m
-
k
-
M
-
G
Questão 18
Questão
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 0.003 A = 3.0 ___A.
Responda
-
m
-
k
-
M
-
G
Questão 19
Questão
Insert the correct prefix (modifier...single-letter initial) to make this statement true: 2,200 Ω = 2.2 _____Ω.
Responda
-
m
-
k
-
M
-
G
Questão 20
Questão
Name the unit we use to describe electrical "power."
Responda
-
Coulomb
-
Steinmetz
-
Watts
-
Ohms
Questão 21
Questão
Name the unit we use to describe electrical "energy."
Responda
-
Watt-hour
-
Watt-second
-
Amp-hour
-
Volt-amps
Questão 22
Questão
Semiconductors have 4 valence electrons in their outer shell. Conductors generally have ________________ 4 valence electrons in their outer shell.
Responda
-
more than
-
fewer than
-
equal to
-
none of the above
Questão 23
Questão
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.
Responda
-
silver
-
copper
-
aluminum
-
iron
Questão 24
Questão
How does the resistance of a wire change as the wire is made longer?
Responda
-
Resistance goes up.
-
Resistance goes down.
-
It doesn't change at all.
-
Cannot tell from the information given.
Questão 25
Questão
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.
Responda
-
metal
-
silicon
-
carbon
-
aluminum
Questão 26
Questão
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.
Responda
-
potentiometer
-
rheostat
-
inductor
-
switch
Questão 27
Questão
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 ________________.
Responda
-
potentiometer
-
rheostat
-
inductor
-
switch
Questão 28
Questão
Name the component represented by this schematic symbol.
Responda
-
ground
-
battery
-
fuse
-
resistor
Questão 29
Questão
Name the component represented by this schematic symbol.
Responda
-
ground
-
battery
-
fuse
-
resistor
Questão 30
Questão
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 ________________.
Responda
-
maze
-
circuit
-
web
-
thread
Questão 31
Questão
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]
Responda
-
6 (six)
-
4 (four)
-
9 (nine)
-
3 (three)
-
1 (one)
-
7 (seven)
-
0 (zero)
-
5 (five)
-
8 (eight)
-
2 (two)
Questão 32
Questão
Ohm's Law is: ________________ = ________________ x ________________
Responda
-
I = R x E
-
R = E x I
-
I = E x R
-
E = I x R
Questão 33
Questão
Using the series circuit shown, if V = 10V and R = 100Ω, how much current is flowing through the circuit?
Responda
-
10.0 A
-
.001 A
-
.100 A
-
100 A
Questão 34
Questão
Using the series circuit shown, if R = 10Ω and I = 0.1A, what is the value for the supply voltage?
Responda
-
1.0V
-
0.1V
-
10V
-
0.01V
Questão 35
Questão
Using the series circuit shown, if V = 100V and I = 0.1A, what is the total resistance?
Responda
-
10Ω
-
100Ω
-
1,000Ω
-
10,000Ω
Questão 36
Questão
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 _________________.
Responda
-
loading
-
mistake
-
unloading
-
parallax
Questão 37
Questão
In the series circuit shown, which meter is correctly positioned for measuring voltage?
Image:
Q38 39 (binary/octet-stream)
Responda
-
Meter 1
-
Meter 2
Questão 38
Questão
In the series circuit shown, which meter is correctly installed for measuring current?
Image:
Q38 39 (binary/octet-stream)
Responda
-
Meter 1
-
Meter 2
Questão 39
Questão
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 __________________.
Responda
-
source
-
ground
-
test
-
hot
Questão 40
Questão
20 kΩ equal ___________.
Responda
-
2,000Ω
-
20,000Ω
-
200,000Ω
-
2,000,000Ω
Questão 41
Questão
Energy that is being stored for possible use is technically or scientifically known as ________________ energy.
Responda
-
potential
-
quantum
-
kinetic
-
static
Questão 42
Questão
Energy that is in motion, performing work in the moment is technically or scientifically known as _____________________ energy.
Responda
-
quantum
-
potential
-
kinetic
-
static
Questão 43
Questão
1 Watt = 1 Volt x 1 ___________
Responda
-
Hour
-
Amp
-
Ohm
-
Farad
Questão 44
Questão
In electricity, power may be calculated as Watts = I^2 x _________.
Responda
-
V
-
R
-
P
-
A
Questão 45
Questão
In a circuit with a source voltage of 120V, the voltage drop across a short circuit equals __________.
Responda
-
120V
-
0V
-
infinite volts
-
unknown
Questão 46
Questão
1 HP = about 750 _____________.
Responda
-
Amps
-
Watts
-
Ohms
-
Volts
Questão 47
Questão
In a circuit with a source voltage of 120V, the voltage drop across an open circuit equals ____________.
Responda
-
120V
-
0V
-
infinite volts
-
unknown
Questão 48
Questão
A series circuit has ______________ path(s) for current to follow.
Responda
-
no
-
one
-
multiple
-
variable
Questão 49
Questão
If current is measured in two different parts of a series circuit, the two measurements will be __________________.
Responda
-
the same
-
proportional to the resistors
-
slightly different
-
unknown
Questão 50
Questão
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 _________________.
Responda
-
100 volts
-
the source voltage
-
a single resistor's ohms
-
unknown
Questão 51
Questão
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 ____________________________.
Responda
-
also increase
-
decrease
-
remain the same
-
change unpredictably
Questão 52
Questão
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 __________________.
Responda
-
equal to each other
-
greater than the total supply voltage
-
higher across the first resistor
-
higher across the second resistor
Questão 53
Questão
How much current is flowing through the series circuit shown?
Responda
-
0.5mA
-
5.0mA
-
5.0µA
-
5.0A
Questão 54
Questão
What is the voltage drop across the 5kΩ resistor in the series circuit shown?
Responda
-
12V
-
25V
-
2.5V
-
0.5V
Questão 55
Questão
What is the voltage of the second battery in the series circuit shown?
Image:
Q58 59 (binary/octet-stream)
Responda
-
12V
-
20V
-
24V
-
36V
Questão 56
Questão
How much current is flowing in the series circuit shown?
Image:
Q58 59 (binary/octet-stream)
Responda
-
6A
-
6mA
-
6µA
-
none of these
Questão 57
Questão
In the series circuit shown, if V = 24V, I = 2.4mA, and R1 = 3.5kΩ what is the value of R2?
Responda
-
10kΩ
-
6.5kΩ
-
6.5Ω
-
10Ω
Questão 58
Questão
In a parallel resistor circuit, the voltage drop is ________________________ across all the resistors in the parallel network.
Responda
-
equal
-
divided proportionally according to the resistor value
-
unpredictable
Questão 59
Questão
In a parallel resistor circuit, if all the resistors are of the same value the current is __________________ through each of the resistors.
Responda
-
the same
-
greater through the first branch resistor
-
greater through the second branch resistor
-
undeterminable
Questão 60
Questão
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.
Responda
-
greatest
-
least
-
same
-
uncalculable
Questão 61
Questão
Total resistance in a parallel circuit is always _______________ the smallest resistor value.
Responda
-
greater than
-
less than
-
equal to
-
unrelated to
Questão 62
Questão
Two 100Ω resistors are connected in parallel. What is their combined resistance?
Responda
-
50Ω
-
75Ω
-
100Ω
-
200Ω
Questão 63
Questão
In the parallel circuit shown, if V=6V, R1=200Ω, and R2=500Ω what is the total resistance?
Responda
-
143Ω
-
200Ω
-
500Ω
-
700Ω
Questão 64
Questão
In the parallel circuit shown, if V=6V, R1=200Ω, and R2=500Ω what is the total current?
Responda
-
42mA
-
4.2µA
-
0.42A
-
8.5mA
Questão 65
Questão
What is the total resistance of this series-parallel circuit?
Responda
-
1660Ω
-
880Ω
-
460Ω
-
1000Ω
Questão 66
Questão
When electric current flows through a coil of wire it transforms the coil into a "temporary" device which is called a(n) ____________________.
Responda
-
bipolar rectifier
-
solenoidal toroid
-
electromagnet
-
diode
Questão 67
Questão
As a wound coil is stretched out longer (like stretching a slinky) the intensity of its magnetic field _________________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined without additional information
Questão 68
Questão
The type of electrical generator which puts out AC is called a(n) ___________________.
Responda
-
buck-boost generator
-
PWM dynamo
-
alternator
-
there is no such thing
Questão 69
Questão
The time required to complete one full alternating sine wave of AC is called the ___________________ of the waveform.
Responda
-
frequency
-
period
-
amplitude
-
window
Questão 70
Questão
The number of complete waveforms that occur in a single second of time is called the _________________ of the waveform.
Responda
-
frequency
-
period
-
amplitude
-
window
Questão 71
Questão
What is the unit we use to describe "cycles per second"?
Responda
-
Hurts
-
Hertz
-
Henries
-
Hours
Questão 72
Questão
A _________________ is a device that combines an electromagnet with one or more sets of switch contacts.
Responda
-
contactor
-
relay
-
both of these
Questão 73
Questão
A coil with a moving armature, used to create short-stroke linear motion, is called a _____________________.
Responda
-
contactor
-
solenoid
-
electromagnet
-
relay
Questão 74
Questão
When a relay is not energized, what resistance should you read across the NC (normally-closed) contacts?
Responda
-
1000Ω
-
0Ω
-
infinite ohms
-
cannot determine without additional information
Questão 75
Questão
If the frequency of an AC signal increases, the time of a single wave cycle __________________.
Responda
-
increases
-
decreases
-
does not change
-
cannot be determined
Questão 76
Questão
What is the more informal and physically descriptive name of the electrical component we call the inductor?
Responda
-
plug
-
core
-
coil
-
wheel
Questão 77
Questão
Inductance gives opposition to any change in circuit _________________.
Responda
-
resistance
-
voltage
-
current
-
power
Questão 78
Questão
When an inductor is first being energized with a DC current, the opposition to current changes is in the form of "back __________."
Responda
-
track
-
EMF
-
resistance
-
power
Questão 79
Questão
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.
Responda
-
high power
-
low ohms
-
kick back
-
feed back
Questão 80
Questão
The variable used to designate "inductance" in an equation is the letter __________.
Responda
-
B
-
K
-
L
-
C
Questão 81
Questão
The primary unit with which we quantify inductance is the _________________.
Responda
-
Gauss
-
Henry
-
Oersted
-
Farad
Questão 82
Questão
As an inductor is stretched out longer (like a slinky) its inductance _______________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information given
Questão 83
Questão
When a permeable core material is added to a hollow inductor, its inductance ______________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information provided
Questão 84
Questão
If we reduce the number of turns of wire in an inductor its inductance _________________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined from the given information
Questão 85
Questão
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 __________________.
Responda
-
30VAC
-
120VAC
-
240VAC
-
480VAC
Questão 86
Questão
The name of the unit used to describe the quantity of capacitance in a capacitor is the _______________.
Responda
-
Henry
-
Farad
-
Tesla
-
Gauss
Questão 87
Questão
As the common surface area of a capacitor's plates increases, the capacitance ______________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined without additional information
Questão 88
Questão
As the dielectric thickness of capacitors increases, separating the plates further apart, the capacitance ______________.
Responda
-
increases
-
decreases
-
remains the same
-
cannot be determined from the information provided
Questão 89
Questão
Which has a higher dielectric constant?
Responda
-
air
-
ceramic
-
aluminum
-
mica
Questão 90
Questão
Capacitors effectively block _______________ current but appear to allow ________________ current to pass through.
Responda
-
direct; alternating
-
alternating; direct
-
variable; direct
-
direct; constant
Questão 91
Questão
CT = C1 + C2 + C3 + ... + Cn is the formula used to calculate total capacitance for capacitors connected in _______________.
Responda
-
series
-
parallel
-
individually
-
no circuit configuration
Questão 92
Questão
For the image shown, what is the peak-to-peak voltage?
Responda
-
5V
-
14V
-
20V
-
27.5V
Questão 93
Responda
-
5V
-
14V
-
20V
-
27.5V
Questão 94
Questão
In the image shown, what is the period of the waveform?
Responda
-
200µs
-
600µs
-
1ms
-
2ms
Questão 95
Questão
In the image shown, what is the frequency for the waveform?
Responda
-
100Hz
-
500Hz
-
1,000Hz
-
5,000Hz
Questão 96
Questão
In the image shown, what is the RMS voltage for the sine wave?
Responda
-
5V
-
7.07V
-
9.75V
-
14.14V
Questão 97
Questão
A transformer has a 4 : 1 turns ratio. If the secondary voltage is 10V and secondary power is 40W, what is the primary current?
Responda
-
1mA
-
1A
-
4A
-
8A
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