Related Questions
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What refers to such work at very low temperaturesa near absolute zero?
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Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the
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4
If the output resistance of a voltage source is 4 a it internal resistance should be
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4
When the temperature of copper wire is increased its resistance is
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4
For series 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
The ratio between the active power and the apparent power of a load in an ac circuit is called
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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
If two equal resistances connected in series across a certain supply are now connected in parallel across the same supplya the power produced will be _____ that of series connection
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If two resistances of 9 and 6 are connected in parallela the total resistance is
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4
The farad is not equivalent to which of the following combination of units
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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
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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4
A capacitor opposes change in
D. Neither voltage nor current
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4
What is the rms value of a square wave?
B. Equals its peak-to-peak value
C. Peak divided by square root of two
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4
If a coil has a Q of 10a it means that
A. The energy stored in the magnetic field of the coil is 10 times the energy wasted in its resistance
B. The energy wasted in its resistance is 10 times the energy stored in the magnetic field of the coil
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4
Conventional flow assumes charges flow from
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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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The wavelength of an alternating waveform depends upon the ___ of the variation.
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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
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 does not generally affect the value of a capacitor?
A. The dielectric material used
B. The surface area of the plates
C. The thickness of the dielectric
D. The voltage applied to the plate
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4
When the power factor of a circuit is zeroa
A. Power absorbed is maximum
B. Power absorbed is minimum
C. Power absorbed is zero
D. The impedance is minimum
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What is the form factor of a triangular wave?
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The arc across a switch when it open an RL circuit is a result of the
A. Large self-induced voltage across L
C. Low resistance of the open switch
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Delta to wye or wye to delta transformation technique is applied to a ___ network.
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The rms value of a triangular or sawtooth waveform is ___ tim value.
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What is the time constant for L of 240 mH in series with R of 20 ?
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4
In a parallel bank with unequal branch resistances
A. The highest R has the highest I
B. The lowest R has the highest V
C. The lowest R has the highest V
D. The highest R has the highest V
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4
What is the temperature coefficient of the resistance Eureka?
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A coil of inductance L has an inductive reactance of XLin an ac circuit in which the effective current is I. The coil is made from a superconducting material. The rate at which power is dissipated in the coil is