Related Questions
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4
For a parallel ACcircuita ___ is used as a reference phasor.
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4
In a circuita an active element is one which
C. Both supplies and receives energy
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4
Which of the following capacitors are used only in dc circuits?
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4
At what frequency will an inductor of 5mH have the same reactance as a capacitor of 0.1 F?
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4
Which of the following is a way of decreasing mutual inductance?
A. Moving the coils closer
B. Moving the coils apart
C. Decreasing the number of turns of either coil
D. Increasing the number of turns of either coil
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4
The current is ____ times the maximum current at half-power points of a resonance curve.
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4
What is the reciprocal of quality factor?
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4
In a resonant circuita if Q ? 10 resonant frequency _______ bandwidth.
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4
Which of the following is the peakiest?
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4
A circuit whose parameters change with voltage or current.
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4
What is the temperature coefficient of the resistance Eureka?
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4
A three-by-threea series-parallel matrix of resistorsa all having the same ohmic valuea would have a net resistance of
A. One-third the value of a single resistor
B. Three times the value of a single resistor
C. The same value as a single resistor
D. Nine times the value of a single resistor
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4
When the temperature of copper wire is increased its resistance is
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4
The value of temperature coefficient ( ) is dependent upon
A. The nature of material and temperature
B. The length of material
C. The cross-sectional area of the material
D. The volume of the material
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4
In a circuita a passive element is one which
C. Both supplies and receives energy
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4
Which one of the following elements serves as a protection against overload?
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4
The maximum power transfer theorem is used in
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4
A neon glow lamp used as a night light ionizes at approximately
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4
What is the purpose of a load in an electric circuit?
A. To increase the circuit current
B. To decrease the circuit current
C. To utilize electrical energy
D. To make the circuit complete
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4
Which of the following dielectric materials makes the lowest-capacitance capacitor?
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4
Norton�s theorem is ____ Thevenin�s theorem.
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4
What is the reading of an ohmmeter for a shorted capacitor?
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4
At parallel resonancea the currents flowing through L and C are
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4
In a series RLCcircuit
A. The current lags VLby 90�
B. The current leads VLby 90�
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4
For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?
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4
Barium-strontium titanite dielectric material is also called
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4
Which of the following is not a factor affecting capacitance oor?
C. Distance between plates
D. Dielectric material used
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4
Which of the following does not refer to electrical energy?
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4
What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?
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4
What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?