12354072
Descripción
Test por Kris Salmons, actualizado hace más de 1 año
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Creado por Kris Salmons
hace casi 7 años
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Pregunta 1
Pregunta
The most commonly accepted theory regarding electricity says that an electric current is a flow of ___________ through a conductor.
Respuesta
-
Protons
-
Electrons
-
Neutrons
Pregunta 2
Pregunta
The unit of measurement for:
... electrical current is [blank_start]Ampere[blank_end].
... resistance against current flow is [blank_start]Ohm[blank_end].
... electrical force, or pressure, is [blank_start]Volt[blank_end].
... electrical power, or energy used, is [blank_start]Watt[blank_end].
Respuesta
-
Ampere
-
Farad
-
Ohm
-
Volt
-
Henry
-
Watt
-
Hertz
Pregunta 3
Pregunta
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 that these metals are good ______________.
Respuesta
-
Insulators
-
Semiconductors
-
Conductors
Pregunta 4
Pregunta
There is a mathematical relationship between the voltage, the current, and the resistance in an electrical circuit. This relationship is called _____________'s Law.
Respuesta
-
Lenz
-
Ohm
-
Tesla
Pregunta 5
Pregunta
Choose the correct prefix to make this statement true: 1,500,000 V = 1.5 ___ V.
Respuesta
-
m
-
k
-
M
-
µ
Pregunta 6
Pregunta
Choose the correct prefix to make this statement true: 0.003 A = 3.0 ___A.
Respuesta
-
m
-
k
-
M
-
µ
Pregunta 7
Pregunta
Choose the correct prefix to make this statement true: 2,200 Ω = 2.2 ___Ω.
Respuesta
-
m
-
k
-
M
-
µ
Pregunta 8
Pregunta
Name the component represented by this schematic symbol shown.
Image:
Q9fig (binary/octet-stream)
Respuesta
-
Battery
-
Fuse
-
Diode
-
Resistor
Pregunta 9
Pregunta
Name the component represented by the schematic symbol shown.
Image:
Q10fig (binary/octet-stream)
Respuesta
-
Ground
-
Battery
-
Fuse
-
Resistor
Pregunta 10
Pregunta
Ohm's Law is: _________ = ____________ x _____________
Respuesta
-
E = I x R
-
R = E x I
-
I = R x E
Pregunta 11
Pregunta
How many ohms are equal to 20 kΩ?
Respuesta
-
2,000
-
20,000
-
200,000
-
2,000,000
Pregunta 12
Pregunta
Energy that is being stored for possible use is technically, or scientifically, known as _____________ energy.
Respuesta
-
Potential
-
Kinetic
-
Quantum
Pregunta 13
Pregunta
In electricity, power in Watts is equal to current times _____________.
Respuesta
-
Voltage
-
Resistance
-
Power
Pregunta 14
Pregunta
A series circuit has _____________ path(s) for current to follow.
Respuesta
-
No
-
One
-
Many
Pregunta 15
Pregunta
If current is measured in two different parts of a series circuit, the two measurements will be _____________.
Respuesta
-
Slightly different
-
The same
-
Very different
Pregunta 16
Pregunta
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 ____________.
Respuesta
-
100 times the source voltage
-
The source voltage
-
3 times the source voltage
-
Negative source voltage
Pregunta 17
Pregunta
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 _______________.
Respuesta
-
Increase
-
Decrease
-
Stays the same
Pregunta 18
Pregunta
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 _______________.
Respuesta
-
Different
-
The same
-
Unable to be determined from the information given
Pregunta 19
Pregunta
The metric value 16 mA can be expressed as _______________.
Respuesta
-
Image:Q20b (binary/octet-stream)
-
Image:Q20c (binary/octet-stream)
-
Image:Q20d (binary/octet-stream)
-
Image:Q20a (binary/octet-stream)
Pregunta 20
Pregunta
86,000 expressed in scientific notation equals ____________.
Respuesta
-
Image:Q21a (binary/octet-stream)
-
Image:Q21b (binary/octet-stream)
-
Image:Q21c (binary/octet-stream)
-
Image:Q21d (binary/octet-stream)
Pregunta 21
Respuesta
-
True
-
False
Pregunta 22
Pregunta
Mega is what relation to kilo?
Respuesta
-
10 times
-
100 times
-
1000 times
-
1,000,000 times
Pregunta 23
Pregunta
Scientific notation is the most widely used form of technical notation in electronics.
Respuesta
-
True
-
False
Pregunta 24
Pregunta
The metric prefix µ is normally associated with ______________ measurements.
Respuesta
-
extremely small
-
small
-
large
-
extremely large
Pregunta 25
Pregunta
Resistance is the opposition to electrical current.
Respuesta
-
True
-
False
Pregunta 26
Pregunta
A 100 kΩ +/- 10% resistor is color coded ___________________.
Respuesta
-
brown, green, black, gold
-
brown, black, yellow, silver
-
brown, black, yellow, gold
-
black, brown, yellow, silver
Pregunta 27
Pregunta
Which type of resistor is used for high-power applications?
Respuesta
-
wire wound
-
carbon composition
-
surface mount
-
film
Pregunta 28
Pregunta
In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross-sectional area of the wire _______________.
Respuesta
-
goes higher
-
goes lower
-
stays the same
Pregunta 29
Pregunta
A 250 µA current flowing through a 4.7 kΩ resistor produces a _____________ voltage drop.
Respuesta
-
18.8 V
-
53.2 V
-
1.175 V
-
1.175 mV
Pregunta 30
Pregunta
If 12 kΩ resistor carries the current of 12 mA, the resistor voltage drop is 1 V.
Respuesta
-
True
-
False
Pregunta 31
Pregunta
Power rating for a resistor is mainly based on the physical size.
Respuesta
-
True
-
False
Pregunta 32
Pregunta
If the voltage were suddenly switched on in the figure shown, ____________________.
Image:
Q33fig (binary/octet-stream)
Respuesta
-
the current would be zero
-
the current would flow
-
the current would gradually decrease
-
the current would gradually decrease and then increase
Pregunta 33
Pregunta
If a 60 Ω resistor carries the current of 12 mA, what's the voltage drop?
Respuesta
-
0.72 volts
-
7.2 volts
-
720 volts
-
72 volts
Pregunta 34
Pregunta
A 47 MΩ +/- 10% resistor is color coded ____________________.
Respuesta
-
violet, blue, silver, gold
-
yellow, violet, blue, silver
-
yellow, violet, green, silver
-
yellow, violet, blue, gold
Pregunta 35
Pregunta
If a resistor of 2.2 MΩ is connected across a 1 kV source, current equals about ____________.
Respuesta
-
2.2 mA
-
0.455 A
-
45.5 µA
-
0.455 mA
Pregunta 36
Pregunta
At constant voltage, resistance and current are ______________.
Respuesta
-
directly proportional
-
similar to voltage
-
unrelated
-
inversely proportional
Pregunta 37
Pregunta
Which of the following terms is not a resistor rating?
Respuesta
-
current
-
resistor tolerance
-
power rating
-
resistor value in ohms
Pregunta 38
Pregunta
If I = 27 mA and R = 4.7 Ω in the figure shown, the voltage equals _________________.
Image:
Q39fig (binary/octet-stream)
Respuesta
-
174 mV
-
5.74 V
-
127 mV
-
7.8 V
Pregunta 39
Pregunta
If 12 V and 17 V sources are wired in series aiding, what is the total supply voltage?
Respuesta
-
29 V
-
12 V
-
17 V
-
5 V
Pregunta 40
Pregunta
Three resistors are connected in series with a 60 V source. If VR1 = 19 V and VR2 = 14.3 V then what is the voltage drop across R3?
Respuesta
-
19 V
-
26.7 V
-
14.3 V
-
45.7 V
Pregunta 41
Pregunta
A 15 kΩ +/- 5% resistor is color coded ___________.
Respuesta
-
black, brown, yellow, silver
-
brown, black, yellow, silver
-
brown, black, yellow, gold
-
brown, green, orange, gold
Pregunta 42
Pregunta
If a 68 Ω, 33 Ω, 100 Ω, and 47 Ω resistor are connected in series with a 9 V battery supply, the current equals ____________.
Respuesta
-
327 mA
-
22.3 mA
-
36.3 mA
-
27.6 A
Pregunta 43
Pregunta
If a 4.7 kΩ, a 5.6 kΩ, and a 10 kΩ resistor are in series, which resistor drops the most voltage?
Respuesta
-
The 5.6 kΩ resistor
-
The 4.7 kΩ resistor
-
The 10 kΩ resistor
-
Cannot be determined from the given information
Pregunta 44
Pregunta
The voltage drop across any resistor or combination of resistors in a series circuit equals:
Respuesta
-
the applied voltage across all resistors
-
the product of the circuit current times the resistance value
-
the ratio of the resistance values times the source voltage
-
all of the above
Pregunta 45
Pregunta
If 5 V and 16 V power supplies are connected in series aiding, what is the total voltage?
Respuesta
-
80 V
-
16 V
-
21 V
-
24 V
Pregunta 46
Pregunta
If there is 100 mA of current flowing into a three-branch parallel circuit and two of the branch currents are 40 mA and 20 mA, the third branch current is _______________.
Respuesta
-
40 mA
-
60 mA
-
160 mA
-
20 mA
Pregunta 47
Pregunta
If currents 5 A and 3 A enter a junction from two separate paths, how much current flows out of the junction?
Respuesta
-
8 A
-
3 A
-
2 A
-
5 A
Pregunta 48
Pregunta
An open fault in one branch of a parallel circuit results in:
Respuesta
-
increased circuit resistance
-
decreased power consumption
-
decreased current flow
-
all of these
Pregunta 49
Pregunta
If a 4.7 kΩ resistor and a 2.2 kΩ resistor are connected in parallel, the total resistance is ______________.
Respuesta
-
2200 Ω
-
4700 Ω
-
greater than 2200 Ω
-
less than 2200 Ω
Pregunta 50
Pregunta
The total resistance of three parallel resistors equals the sum of the individual resistor values.
Respuesta
-
True
-
False
Pregunta 51
Respuesta
-
(a)
-
(b)
-
(c)
-
(d)
-
(e)
Pregunta 52
Pregunta
Using the circuit shown, calculate the voltage drop across each resistor and the total circuit current.
Round your answers to three significant figures.
Image:
Q53 (binary/octet-stream)
Respuesta
-
1.80
-
3.24
-
6.72
-
.012
Pregunta 53
Pregunta
Using the circuit in the figure shown, calculate each branch current, total circuit current, and the voltage drop across R3.
Round your answers to three significant figures.
Image:
Q54fig (binary/octet-stream)
Respuesta
-
.133
-
.074
-
.036
-
20
-
.243
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