Related Questions
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The ratio of maximum value to the effective value of an alternating quantity is called
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Transient period is considered over after
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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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4
A capacitance of 0.05 F equals
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In a rectangular wavea the form factor is
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What is the peak factor for alternating current or voltage varying sinusiodally?
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4
For a series circuita the higher the quality factor
A. The greater the bandwidth
B. The narrower the passband
C. The broader the resonance curve
D. The wider the passband
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4
The capacitance of a capacitor is ___ relative permittivity.
A. Directly proportional to
B. Inversely proportional to
D. Inversely proportional to the square of
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4
A series-parallel combination of identical resistors will
A. Increase the power rating compared with one resistor alone
B. Increase the voltage rating compared with one resistor alone
C. Reduce the voltage rating compared with resistor alone
D. Result in an expensive circuit
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Another term of the quality factor of the resonant circuit.
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The potential gradient in a cable is maximum in
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The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera the load voltage will be
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What refers to such work at very low temperaturesa near absolute zero?
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Rationalizing the denominator of a complex number means
A. Eliminating the j component in the denominator
B. Adding j component in the denominator
C. Eliminating the j component in the numerator
D. Adding j component in the numerator
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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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Metal tin becomes superconductor at approximately
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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
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
A trimmer is a variable capacitor in which capacitance is varied by changing the
C. Distance between plates
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Which component opposes voltage change?
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In a series RLCcircuit
A. Increasing the frequency decreases the resistance
B. Increasing the frequency increases the resistance
C. Both XLand XCchange as frequency changes
D. Impedance will always decrease
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4
An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?
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In a pure capacitancea
A. Current leads voltage by 90�
B. Current leads voltage by 180�
C. Current lags voltage by 90�
D. Current lags voltage by 180�
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An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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What is the specific resistance of a pure silicon?
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What fusion of elements is without chemical action between them?
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A capacitor is basically constructed of
A. Two conductors separated by a dielectric
B. Two dielectric separated by a conductor
C. Conductors and dielectric
D. Conductors and semiconductors
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The resistance of an insulator ___ when its temperature is increased.
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When the movable plates of a gang capacitor completely overlap the fixed platesa the capacitance of the capacitor is
A. Halfway between maximum and minimum
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Norton�s theorem is what form of an ac equivalent circuit?
C. Both voltage and current
D. Neither voltage nor current