Related Questions
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4
Liquids that are good conductors because of ionization are called
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What is a closed path made of several branches of the network called?
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4
With double the number of turns by the same length and areaa the inductance is
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4
A switch designed to have low capacitance between its terminal when open.
C. Anticapacitance switch
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4
Which is considered as the effect of a dielectric material?
A. Increasing capacitance
B. Decreasing capacitance
C. Reducing the working voltage
D. Increasing the distance between the plates
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4
When the temperature of copper wire is increased its resistance is
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4
Which of the following capacitors is suitable for dc filter circuits?
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If two resistances of 9 and 6 are connected in parallela the total resistance is
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4
For parallel capacitorsa total charge is
A. The sum of individual charges
B. Equal to the charge of either capacitors
C. Equal to the product of the charges
D. The quotient of the charges
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4
A series RLCcircuit has a ______ power factor at its half-power points
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What capacitance exists not through design but simply because two conducting surfaces are relatively close to each other?
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4
In an RL series circuita
A. Current lags voltage by less than 90�
B. Current lags voltage by 180�
C. Current lags voltage by 90�
D. Current leads voltage by 90�
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4
Norton�s theorem is ____ Thevenin�s theorem.
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In calculating maximum instantaneous power ___ voltage or current is used.
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The rms value of a triangular or sawtooth waveform is ___ tim value.
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4
Series resonance occurs when
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In an ac wavea 30 degrees of phase is ___ of a cycle.
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4
Resistor with colored bands in the body
B. Carbon-composition resistor
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4
Transient period is considered over after
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Points to be considered in choosing a capacitor
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When two coils of identical reactance are in parallel without mutual inductancea the reactance of the combination is ___ the reactance of each coil.
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4
A trimmer is a variable capacitor in which capacitance is varied by changing the
C. Distance between plates
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4
If a multiplate capacitor has 10 platesa each of area 10 cm2a then
A. 10 capacitors will be in parallel
B. 10 capacitors will be in series
C. 9 capacitors will be in parallel
D. 9 capacitors will be in series
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4
When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is
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4
If a certain circuit has a current that is lagging the voltage by 45�a then it displays
A. Pure inductive reactance
B. Resistance and capacitance reactance
C. Resistance and inductive reactance
D. Pure capacitive reactance
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4
Which of the following has negative temperature coefficient?
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The ratio of maximum value to the effective value of an alternating quantity is called
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Which of the following is a preferred resistor value?
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4
The power factor of a circuit is equal to
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In adding or subtracting phasor quantitiesa ___ form is the most convenient.