Test
Fundamentals Midterm Written Practice Exam
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Preguntas del test (53)
1The most commonly accepted theory regarding electricity says that an electric current is a flow of ___________ through a conductor.
- AProtons
- BElectrons
- CNeutrons
2The 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].- AAmpere
- BFarad
- COhm
- DVolt
- EHenry
- FWatt
- GHertz
3All 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 ______________.
- AInsulators
- BSemiconductors
- CConductors
4There is a mathematical relationship between the voltage, the current, and the resistance in an electrical circuit. This relationship is called _____________'s Law.
- ALenz
- BOhm
- CTesla
5Choose the correct prefix to make this statement true: 1,500,000 V = 1.5 ___ V.
- Am
- Bk
- CM
- Dµ
6Choose the correct prefix to make this statement true: 0.003 A = 3.0 ___A.
- Am
- Bk
- CM
- Dµ
7Choose the correct prefix to make this statement true: 2,200 Ω = 2.2 ___Ω.
- Am
- Bk
- CM
- Dµ
8Name the component represented by this schematic symbol shown.
- ABattery
- BFuse
- CDiode
- DResistor
9Name the component represented by the schematic symbol shown.
- AGround
- BBattery
- CFuse
- DResistor
10Ohm's Law is: _________ = ____________ x _____________
- AE = I x R
- BR = E x I
- CI = R x E
11How many ohms are equal to 20 kΩ?
- A2,000
- B20,000
- C200,000
- D2,000,000
12Energy that is being stored for possible use is technically, or scientifically, known as _____________ energy.
- APotential
- BKinetic
- CQuantum
13In electricity, power in Watts is equal to current times _____________.
- AVoltage
- BResistance
- CPower
14A series circuit has _____________ path(s) for current to follow.
- ANo
- BOne
- CMany
15If current is measured in two different parts of a series circuit, the two measurements will be _____________.
- ASlightly different
- BThe same
- CVery different
16In 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 ____________.
- A100 times the source voltage
- BThe source voltage
- C3 times the source voltage
- DNegative source voltage
17In 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 _______________.
- AIncrease
- BDecrease
- CStays the same
18In 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 _______________.
- ADifferent
- BThe same
- CUnable to be determined from the information given
19The metric value 16 mA can be expressed as _______________.
- A
- B
- C
- D
- A
2086,000 expressed in scientific notation equals ____________.
- A
- B
- C
- D
- A
21In engineering notation, 82,000 is expressed as shown.
- ATrue
- BFalse
22Mega is what relation to kilo?
- A10 times
- B100 times
- C1000 times
- D1,000,000 times
23Scientific notation is the most widely used form of technical notation in electronics.
- ATrue
- BFalse
24The metric prefix µ is normally associated with ______________ measurements.
- Aextremely small
- Bsmall
- Clarge
- Dextremely large
25Resistance is the opposition to electrical current.
- ATrue
- BFalse
26A 100 kΩ +/- 10% resistor is color coded ___________________.
- Abrown, green, black, gold
- Bbrown, black, yellow, silver
- Cbrown, black, yellow, gold
- Dblack, brown, yellow, silver
27Which type of resistor is used for high-power applications?
- Awire wound
- Bcarbon composition
- Csurface mount
- Dfilm
28In the American Wire Gauge sizes, as the numerical value of AWG goes higher, the cross-sectional area of the wire _______________.
- Agoes higher
- Bgoes lower
- Cstays the same
29A 250 µA current flowing through a 4.7 kΩ resistor produces a _____________ voltage drop.
- A18.8 V
- B53.2 V
- C1.175 V
- D1.175 mV
30If 12 kΩ resistor carries the current of 12 mA, the resistor voltage drop is 1 V.
- ATrue
- BFalse
31Power rating for a resistor is mainly based on the physical size.
- ATrue
- BFalse
32If the voltage were suddenly switched on in the figure shown, ____________________.
- Athe current would be zero
- Bthe current would flow
- Cthe current would gradually decrease
- Dthe current would gradually decrease and then increase
33If a 60 Ω resistor carries the current of 12 mA, what's the voltage drop?
- A0.72 volts
- B7.2 volts
- C720 volts
- D72 volts
34A 47 MΩ +/- 10% resistor is color coded ____________________.
- Aviolet, blue, silver, gold
- Byellow, violet, blue, silver
- Cyellow, violet, green, silver
- Dyellow, violet, blue, gold
35If a resistor of 2.2 MΩ is connected across a 1 kV source, current equals about ____________.
- A2.2 mA
- B0.455 A
- C45.5 µA
- D0.455 mA
36At constant voltage, resistance and current are ______________.
- Adirectly proportional
- Bsimilar to voltage
- Cunrelated
- Dinversely proportional
37Which of the following terms is not a resistor rating?
- Acurrent
- Bresistor tolerance
- Cpower rating
- Dresistor value in ohms
38If I = 27 mA and R = 4.7 Ω in the figure shown, the voltage equals _________________.
- A174 mV
- B5.74 V
- C127 mV
- D7.8 V
39If 12 V and 17 V sources are wired in series aiding, what is the total supply voltage?
- A29 V
- B12 V
- C17 V
- D5 V
40Three 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?
- A19 V
- B26.7 V
- C14.3 V
- D45.7 V
41A 15 kΩ +/- 5% resistor is color coded ___________.
- Ablack, brown, yellow, silver
- Bbrown, black, yellow, silver
- Cbrown, black, yellow, gold
- Dbrown, green, orange, gold
42If a 68 Ω, 33 Ω, 100 Ω, and 47 Ω resistor are connected in series with a 9 V battery supply, the current equals ____________.
- A327 mA
- B22.3 mA
- C36.3 mA
- D27.6 A
43If a 4.7 kΩ, a 5.6 kΩ, and a 10 kΩ resistor are in series, which resistor drops the most voltage?
- AThe 5.6 kΩ resistor
- BThe 4.7 kΩ resistor
- CThe 10 kΩ resistor
- DCannot be determined from the given information
44The voltage drop across any resistor or combination of resistors in a series circuit equals:
- Athe applied voltage across all resistors
- Bthe product of the circuit current times the resistance value
- Cthe ratio of the resistance values times the source voltage
- Dall of the above
45If 5 V and 16 V power supplies are connected in series aiding, what is the total voltage?
- A80 V
- B16 V
- C21 V
- D24 V
46If 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 _______________.
- A40 mA
- B60 mA
- C160 mA
- D20 mA
47If currents 5 A and 3 A enter a junction from two separate paths, how much current flows out of the junction?
- A8 A
- B3 A
- C2 A
- D5 A
48An open fault in one branch of a parallel circuit results in:
- Aincreased circuit resistance
- Bdecreased power consumption
- Cdecreased current flow
- Dall of these
49If a 4.7 kΩ resistor and a 2.2 kΩ resistor are connected in parallel, the total resistance is ______________.
- A2200 Ω
- B4700 Ω
- Cgreater than 2200 Ω
- Dless than 2200 Ω
50The total resistance of three parallel resistors equals the sum of the individual resistor values.
- ATrue
- BFalse
51Identify the rotary switch from the figure shown.
- A(a)
- B(b)
- C(c)
- D(d)
- E(e)
52Using the circuit shown, calculate the voltage drop across each resistor and the total circuit current.
Round your answers to three significant figures.
- A1.80
- B3.24
- C6.72
- D.012
53Using 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.
- A.133
- B.074
- C.036
- D20
- E.243
Información
- Descripción
- Early College Electrical Technology Test sobre Fundamentals Midterm Written Practice Exam, creado por Kris Salmons el 19/02/2018.
- Autor
- Kris Salmons
- Idioma
- English
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- 2.464
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