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Electrical Engineering
Voltage, Current And Resistance
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Q.1
The nominal value of a brown, black, yellow, and gold resistor is 100,000 ohms.
True
False
Q.2
A wiper is the sliding contact in a
Switch
Photoconductive cell
Thermistor
Potentiometer
Q.3
When the current is 2.5 A, how many coulombs pass a point in 0.2 s?
12.5 C
1.25 C
0.5 C
5 C
Q.4
A free electron is a valence electron that has broken away from its parent atom.
True
False
Q.5
The atomic number is the number of neutrons in the nucleus.
True
False
Q.6
An open circuit is one that has a complete current path.
True
False
Q.7
A neutral atom is one with an equal number of protons and electrons.
True
False
Q.8
Free electrons make current possible.
True
False
Q.9
A material that does not allow current under normal conditions is a/an
Insulator
Conductor
Semiconductor
Valence
Q.10
The unit of electrical charge is the
Coulomb
Joule
Volt
Watt
Q.11
Eighttenths coulomb passes a point in 4 s. The current in amperes is
1.6 A
16 A
2 A
0.2 A
Q.12
Current flows in a circuit when
A switch is opened
A switch is closed
The switch is either open or closed
There is no voltage
Q.13
An ammeter is connected across the current path.
True
False
Q.14
A voltmeter is connected across the current path.
True
False
Q.15
An ohmmeter is an instrument for measuring
Current
Voltage
Resistance
Wattage
Q.16
A red, red, orange, gold resistor has a nominal value of
22,000 Ω
2,200 Ω
22 Ω
2.2 Ω
Q.17
A twoterminal variable resistor is known as a
Potentiometer
Thermistor
Rheostat
Wiper
Q.18
The maximum resistance value for a brown, red, yellow, gold resistor is
126,000 Ω
126,600 Ω
114,000 Ω
132,000 Ω
Q.19
Which of the following is not a type of energy source?
Generator
Rheostat
Solar cell
Battery
Q.20
A thermistor is a type of
Switch
Resistor
Battery
Power supply
Q.21
A potentiometer is a twoterminal variable resistor.
True
False
Q.22
The current in a given circuit is not to exceed 24 A. Which value of fuse is best?
A fuse is not necessary
10 A
24 A
20 A
Q.23
Electrons in the outer orbit are called
Nuclei
Valences
Waves
Shells
Q.24
An ammeter is an electrical instrument used to measure
Current
Voltage
Resistance
None of the above
Q.25
The minimum resistance value for a blue, gray, red, silver resistor is
Q.26
When placed close together, two positively charged materials will
Attract
Become neutral
Become negative
Repel
Q.27
A circuit breaker is a
Fuse
Switch
Resettable protective device
Resistor
Q.28
Materials with lots of free electrons are called
Conductors
Insulators
Semiconductors
Filters
Q.29
The colored bands for a 4,700 ohm resistor with a ten percent tolerance are
Yellow, violet, red, gold
Yellow, violet, orange, gold
Yellow, violet, red, silver
Orange, violet, red, silver
Q.30
A two-terminal variable resistor is known as a
potentiometer
thermistor
rheostat
wiper
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