What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
A. 3 W
B. 6 W
C. 64 W
D. 122 W
E. None of the above
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Which one of the following kinds of materials has the highest permeability?
A. A diamagnetic material
B. A ferromagnetic material
C. A paramagnetic material
D. All of the above
E. None of the above
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Inductive reactance is measured in units of:
A. volts per second
B. amperes per second
C. Ohm
D. henrys
E. None of the above
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What is the difference between the kinds of charges for an electron and a proton?
A. An electron has a positive charge and a proton has no charge
B. An electron has a positive charge and a proton has a negative charge
C. An electron has a negative charge and a proton has a positive charge
D. An electron has a negative charge and a proton has no charge
E. None of the above
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An ideal voltage source has
A. Zero internal resistance
B. Infinite internal resistance
C. A load dependent voltage
D. A load-dependent current
E. None of the above
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A transistor has how many doped regions?
A. 1
B. 2
C. 3
D. 4
E. None of the above
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The voltage across a 1N4001 is 0.93V when the current is 1A. What is the power dissipation of the diode for these values?
A. 0.93 W
B. 0.93 V
C. 1:00 AM
D. 9.3 W
E. None of the above
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A loadstone is:
A. a natural magnet
B. a temporary magnet
C. an artificial magnet
D. a paramagnetic alloy
E. None of the above
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Which one of the following phrases most accurately describes a purely capacitive circuit?
A. Resistances provide the only opposition to current flow
B. Capacitive reactance provides the only opposition to current flow
C. The ac voltage leads the current by 90 degree
D. Combinations of resistance and capacitive reactance provide any opposition to current flow
E. None of the above
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The saturation point is approximately the same as
A. cutoff point
B. lower end of the load line
C. upper end of the load line
D. infinity
E. None of the above
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Which one of the following statements is true for the currents in a series RC circuit?
A. The current always has the same amplitude and phase for every part of the circuit
B. The total current is equal to the sum of the currents for the resistance and capacitance
C. The total current is greater than the sum of the currents for the resistance and capacitance
D. The total current is less than the sum of the currents for the resistance and capacitance
E. None of the above
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The total inductance of a series inductor circuit is:
A. equal to the sum of the individual inductance values
B. equal to the sum of the individual inductive-reactance values
C. less than the value of the smallest inductor
D. equal to the source voltage divided by total current
E. None of the above
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Determine the resistance value and tolerance of a resistor that has the following color bands; first band is red, second band is red, third band is orange, and the fourth band is gold
A. 220 Ohm, 5%
B. 220 Ohm, 10%
C. 22,000 Ohm, 5%
D. 22, 000 Ohm, 10%
E. None of the above
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Which one of the following is most likely used for measuring the rate of electron flow?
A. Voltmeter
B. Ammeter
C. Wattmeter
D. Ohmmeter
E. None of the above
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Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?
A. 20 Ohm
B. 30 Ohm
C. 10 Ohm
D. 100 Ohm
E. None of the above
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Which one of the following statements regarding ac circuits is correct?
A. Current and voltages are in phase through a resistor
B. Current leads the voltage through a resistor
C. Current lags the voltage through a resistor
D. All of the above
E. None of the above
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Which one of the following statements most accurately describes the nature of inductive reactance?
A. Inductive reactance is an opposition to current flow in dc circuits
B. Inductive reactance is an opposition to current flow in ac circuits
C. Inductive reactance is another term for counter emf
D. Inductive reactance is a force that tends to overcome the effects of counter emf
E. None of the above
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What are the main parts of an atom?
A. Protons only
B. Electrons, protons, and ions
C. Electrons, ions, and neutrons
D. Electrons, protons, and neutrons
E. None of the above
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Current is
A. The flow of charged particles through a material
B. An imbalance of electrical charges
C. The force that causes electrons to flow
D. The number of free electrons in an atom
E. None of the above
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A real voltage source has
A. Zero internal resistance
B. Infinite internal resistance
C. A small internal resistance
D. A large internal resistance
E. None of the above
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