Related Questions
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4
If two complex conjugates are addeda ___ components results.
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Which component opposes voltage change?
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4
What fusion of elements is without chemical action between them?
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4
What is the specific resistance of a pure silicon?
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4
What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red
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4
Two complex numbers or phasors are said to be conjugate if they
A. Differ only in the algebraic sign of their quadratic components
B. Differ only in the algebraic sign of their real components
C. Are equal in their real and quadrature components including alge
D. Are equal in their real components but differ in their quadrature components i ncluding algebraic signs.
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4
How many degrees of phase represents one full cycle?
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Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.
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VL= VCin a series RLCcircuit when
A. The value of the impedance is minimum
B. The power factor is zero
C. The current leads the total voltage by 90�
D. The total voltage is zero
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4
Inductive reactance applies only to sine waves because it
A. Increases with lower frequencies
B. Increases with lower inductance
C. Depends on the factor 2
D. Decreases with higher frequencies
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4
An open inductor has
A. Zero resistance and infinite inductance
B. Infinite resistance and zero inductance
C. Infinite resistance and infinite inductance
D. Zero resistance and zero inductance
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4
Which of the following does not affect resistance?
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4
Which one of the following elements serves as a protection against overload?
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4
An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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4
A linear circuit is one whose parameters
A. Change with change in voltage
B. Change with change in current
C. Do not change with voltage and current
D. Change with change in voltage and current
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4
The hot resistance of an incandescent lamp is about ___ times its cold resistance.
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What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?
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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
At parallel resonancea the currents flowing through L and C are
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4
What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
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4
Which of the following has a positive temperature coefficient?
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The presence of an electric current is made known by
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For a parallel ACcircuita ___ is used as a reference phasor.
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What is the peak factor for alternating current or voltage varying sinusiodally?
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The Q-factor of a series resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
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4
A capacitance of 6 ��F means
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4
Thevenin�s theorem is what form of an equivalent circuit?
C. Both current and voltage
D. Neither current nor voltage
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If three 9 mH inductors are connected in parallel without mutual inductance then the total i nductance is
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4
A 5 F capacitor charge to 5V has a stored charge equal to
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What is a rotating vector whose projection can represent either current or voltage in an ac circuit?