Related Questions
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4
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
In a series circuit with unequal resistances the
A. Highest R has the highest V
B. Lowest R has the highest V
C. Lowest R has the highest I
D. Highest R has the highest I
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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
The ratio of maximum value to the effective value of an alternating quantity is called
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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
Which of the following has a positive temperature coefficient?
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4
Which of the following dielectric materials makes the lowest-capacitance capacitor?
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4
An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage
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4
Which of the following is the peakiest?
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4
When two complex conjugates are subtracteda the result is a
A. Quadrature component only
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Which of the following is the most popular waveform?
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4
What is the form factor of a triangular wave?
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4
Which of the following is neither a basic physical law nor deliverable from one?
D. Kirchhoff�s second law
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4
The ratio of the flux density to the electric field intensity in the dielectric is called
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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
Which of the statements below is not true?
A. Current source is an active element
B. Resistor is a linear element
C. Voltage source is a passive element
D. Diode is a non-linear element
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4
For multi-plate capacitora capacitance is proportional to
A. Number of plates less one(n ± 1)
B. Number of plates plus one(n + 1)
C. Number of plates less two(n - 2)
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4
Another term of the quality factor of the resonant circuit.
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4
Barium-strontium titanite dielectric material is also called
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4
As applied to a series RLCcircuita bandwidth means
A. The frequency range for maximum power transfer
B. The difference between the highest and lowest frequencies of the oscillator
C. The separation of the half-power points
D. The frequency at which XL= XC
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4
An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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4
In a rectangular wavea the form factor is
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4
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
For a parallel ACcircuita ___ is used as a reference phasor.
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4
The resistance of an insulator ___ when its temperature is increased.
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4
Metal tin becomes superconductor at approximately
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4
Which of the following is not considered a physical factor affecting resistance?
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4
The capacitor opposes any change in voltage across it by
A. Passing a voltage proportional to the rate of change of current
B. Acting as a short circuit at time equal to zero
C. Passing a current proportional to the rate of change of voltage
D. Acting as a short circuit at time equal to infinity
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4
What is the total resistance of a two equal valued resistors in series?
A. The difference of both
D. The sum of their reciprocals
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4
The voltage lags the current by cycle in a
A. Purely resistive circuit
B. Purely inductive circuit
C. Purely capacitive circuit
D. Circuit containing resistancea capacitance and inductance