Which one of the following statements is true?
A. Current flows in a capacitor circuit only while ions are permitted to flow through the dielectric material
B. Current flows in a capacitor circuit only while the charge on the plates is large enough to force the dielectric to conduct electrons
C. Current can flow in a capacitor circuit, but not through the dielectric material itself
D. Power returned to the circuit is always greater than the power absorbed
E. None of the above
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What is the total resistance of a series circuit that contains four resistors having values of 220W, 470W, 1W, and 1.2W?
A. 692.2 Ohm
B. 844.5 Ohm
C. 3890 Ohm
D. 1234 Ohm
E. None of the above
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Holes act like:
A. Atoms
B. Crystals
C. Negative charges
D. Positive charges
E. None of the above
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How may valence electrons does a silicon atom have?
A. 0
B. 1
C. 2
D. 4
E. None of the above
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Reducing the amount of current through an inductor:
A. reduces the value of inductance by one-half
B. multiplies the value of inductance by four
C. multiplies the value of inductance by two
D. has no effect on the inductance
E. None of the above
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Which one of the following statements best applies to a series RLC circuit?
A. The voltage waveform for each component always has the same amplitude and phase as the applied voltage
B. The current waveform for each component always has the same amplitude and phase as the applied current
C. All of the above
D. The sum of the current is always less than the applied current
E. None of the above
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When applying a square waveform to a capacitor, the circuit tends to:
A. peak the voltage and round off the current waveforms
B. peak the current and round off the voltage waveforms
C. round off both the voltage and current waveforms
D. peak both the voltage and current waveforms
E. None of the above
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Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?
A. Number of lines of force
B. Flux density
C. Reluctance
D. Magnetomotive force
E. None of the above
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Who invented the first junction transistor?
A. Smith
B. Gomes
C. Fisher
D. Shockley
E. None of the above
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When a series RLC circuit is operating at its resonant frequency:
A. capacitive reactance is greater than the inductive reactance
B. inductive reactance is greater than the capacitive reactance
C. inductive reactance is equal to the capacitive reactance
D. the difference between inductive and capacitive reactance is equal to the resistance
E. None of the above
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Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?
A. R = E2 /P
B. P = PR
C. P = E2 /R
D. I = P/E
E. None of the above
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The total capacitive reactance of a parallel capacitor circuit is:
A. equal to the sum of the individual capacitive-reactance values
B. equal to the sum of the individual capacitance values
C. equal to the source voltage divided by total current
D. less than the capacitance value of the smallest capacitor
E. None of the above
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Thevenin theorem replaces a complicated circuit facing a load by an
A. Ideal voltage source and parallel resistor
B. Ideal current source and parallel resistor
C. Ideal voltage source and series resistor
D. Ideal current source and series resistor
E. None of the above
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What kind of device is a diode?
A. Bilateral
B. Linear
C. Nonlinear
D. Unipolar
E. None of the above
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Which one of the following statements applies to common, non-rechargeable flashlight batteries?
A. Common flashlight batteries are secondary wet-cell batteries
B. Common flashlight batteries are primary wet-cell batteries
C. Common flashlight batteries are primary dry-cell batteries
D. Common flashlight batteries are secondary dry-cell batteries
E. None of the above
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The total inductive reactance of a parallel inductor circuit is:
A. equal to the sum of the individual inductive-reactance values
B. equal to the sum of the individual inductance values
C. equal to the source voltage divided by total current
D. less than the inductance value of the smallest inductor
E. None of the above
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A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?
A. 12 V
B. 18 V
C. 24 V
D. 30 V
E. None of the above
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Norton's theorem replaces a complicated circuit facing a load by an
A. Ideal voltage source and parallel resistor
B. Ideal current source and parallel resistor
C. Ideal voltage source and series resistor
D. Ideal current source and series resistor
E. None of the above
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Which one of the following statements regarding ac circuits is correct?
A. Current and voltage are in phase through an inductor
B. Current leads the voltage through an inductor
C. Current lags the voltage through an inductor
D. All of the above
E. None of the above
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Doubling the operating frequency of a capacitive circuit:
A. doubles the amount of a capacitive reactance
B. has no effect on the capacitive reactance
C. cuts the capacitive reactance in half
D. multiplies the capacitive reactance by 6.28
E. None of the above
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