13633924
Descripción
Test por Katrina Himes, actualizado hace más de 1 año
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Creado por Katrina Himes
hace casi 6 años
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Pregunta 1
Pregunta
A real voltage source has
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Zero internal resistance
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Infinite internal resistance
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A small internal resistance
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A large internal resistance
Pregunta 2
Pregunta
If a load resistance is 100 Ω, a stiff voltage source has a resistance of
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Less than 1 Ω
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At least 10 Ω
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More than 10 kΩ
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Less than 10 kΩ
Pregunta 3
Pregunta
The Thevenin voltage is the same as the
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Shorted-load voltage
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Open-load voltage
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Ideal source voltage
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Norton voltage
Pregunta 4
Pregunta
An open resistor has
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Infinite current through it
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Zero voltage across it
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Infinite voltage across it
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Zero current through it
Pregunta 5
Pregunta
A shorted resistor has
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Infinite current through it
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Zero voltage across it
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Infinite voltage across it
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Zero current through it
Pregunta 6
Pregunta
The voltage out of an ideal voltage source
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Is zero
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Is constant
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Depends on the value of load resistance
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Depends on the internal resistance
Pregunta 7
Pregunta
Assume the valence electron is removed from a copper atom. The net charge of the atom becomes
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0
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+1
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-1
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+4
Pregunta 8
Pregunta
Which is the most widely used semiconductor?
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Copper
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Germanium
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Silicon
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None of the above
Pregunta 9
Pregunta
Silicon atoms combine into an orderly pattern called a
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Covalent bond
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Crystal
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Semiconductor
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Valence orbit
Pregunta 10
Pregunta
The flow of valence electrons to the right means that holes are flowing to the
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Left
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Right
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Either way
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None of the above
Pregunta 11
Pregunta
Trivalent atoms have how many valence electrons?
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1
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3
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4
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5
Pregunta 12
Pregunta
Negative ions are atoms that have
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Gained a proton
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Lost a proton
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Gained an electron
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Lost an electron
Pregunta 13
Pregunta
What is the barrier potential of a silicon diode at room temperature?
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0.3 V
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0.7 V
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1 V
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2 mV per degree Celsius
Pregunta 14
Pregunta
The voltage where avalanche occurs is called the
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Barrier potential
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Depletion layer
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Knee voltage
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Breakdown voltage
Pregunta 15
Pregunta
When the diode current is large, the bias is
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Forward
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Inverse
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Poor
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Reverse
Pregunta 16
Pregunta
The knee voltage of a diode is approximately equal to the
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Applied voltage
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Barrier potential
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Breakdown voltage
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Forward voltage
Pregunta 17
Pregunta
The ideal diode is usually adequate when
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Troubleshooting
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Doing precise calculations
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The source voltage is low
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The load resistance is low
Pregunta 18
Pregunta
The second approximation works well when
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Troubleshooting
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Load resistance is high
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Source voltage is high
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All of the above
Pregunta 19
Pregunta
If the line frequency is 60 Hz, the output frequency of a bridge rectifier is
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30 Hz
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60 Hz
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120 Hz
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240 Hz
Pregunta 20
Pregunta
With the same secondary voltage and filter, which has the most ripple?
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Half-wave rectifier
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Full-wave rectifier
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Bridge rectifier
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Impossible to say
Pregunta 21
Pregunta
If the secondary voltage increases in a bridge rectifier with a capacitor-input filter, the load voltage will
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Decrease
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Stay the same
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Increase
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None of these
Pregunta 22
Pregunta
If the filter capacitance is increased, the ripple will
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Decrease
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Stay the same
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Increase
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None of these
Pregunta 23
Pregunta
A circuit that removes positive or negative parts of a waveform is called a
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Clamper
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Clipper
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Diode clamp
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Limiter
Pregunta 24
Pregunta
With a half-wave rectified voltage across the load resistor load current flows for what part of a cycle?
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0°
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90°
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180°
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360°
Pregunta 25
Pregunta
A circuit that adds a positive or negative dc voltage to an input sine wave is called a
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Clamper
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Clipper
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Diode clamp
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Limiter
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