Related Questions
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4
What is the temperature coefficient of the resistance Eureka?
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What theorem is usually used in the analysis of transistor circuit?
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If two resistances of 9 and 6 are connected in parallela the total resistance is
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Capacitance increase with
A. Larger plate area and less distance between plates
B. Larger plate area and greater distance between plates
C. Smaller plate area and less distance between plates
D. Higher values of applied voltage
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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
A neon glow lamp used as a night light ionizes at approximately
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The wavelength of an alternating waveform depends upon the ___ of the variation.
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A lead conductor has a resistance of 25 at 0 �C. Determine its resistance at -30 �C
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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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The ratio of the flux density to the electric field intensity in the dielectric is called
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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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4
Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is
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What refers to such work at very low temperaturesa near absolute zero?
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The result of rust in electrical (wire) connection is
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What is the cross-sectional are of a conductor whose diameter is 0.001 inch?
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In a multiple capacitora the plate area is
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What is the peak factor of a triangular wave?
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Effects of capacitance
A. It opposes any change in the amount of voltage
B. Voltage is lagged behind the current by a quarter cycle
C. Electric energy is stored in the capacitor in the form of electrostatic field
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What is the complex impedance of a circuit with an absolute resistance of 300 ?
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What is the time constant for L of 240 mH in series with R of 20 ?
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A term used to express the amount of electrical energy stored in electrostatic field.
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The rms value of a triangular or sawtooth waveform is ___ tim value.
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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
A series RLCcircuit consists of a 10 resistor in series with L = 10 Ha and C= 100 F. Determine a new value of Ia for which the resonant frequency is one ±half the original value.
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An inductive circuit of resistance 16.5 and inductance of 0.14 H takes a current of 25 ?. if the frequency is 50 Hza find the supply voltage.
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Which of the following dielectric materials makes the highest-capacitance capacitor?
B. Barium-strontium titanite
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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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Which factor does not affect resistance?
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4
In the 5-band method of capacitor color codinga the first band indicates
A. Temperature coefficient
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What is the reciprocal of quality factor?