Related Questions
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4
A linear circuit is one whose parameters
A. Change with change in voltage
B. Change with change in current
C. Do not change with voltage and current
D. Change with change in voltage and current
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4
What is the form factor of a triangular wave?
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4
What is the time constant for L of 240 mH in series with R of 20 ?
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4
What theorem is usually used in the analysis of transistor circuit?
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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
The reason why electrical appliances are not connected in series.
A. Greater electrical power saving
C. Appliances have different current ratings
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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
In liquids and gasesa ionization current results from a flow of
A. Positive or negative ions
C. Ions that are lighter in weight than electrons
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4
What rating of a resistor determines its ability to absorb heat?
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4
Which of the following capacitors are used only in dc circuits?
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4
For a carbon composition resistora typical resistance values range from
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4
Resistor with colored bands in the body
B. Carbon-composition resistor
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4
If three 9 mH inductors are connected in parallel without mutual inductance then the total i nductance is
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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
Which of the following conditions is not true for a series RLCcircuit at resonance?
C. The power factor is one
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4
A trigger circuit consisting of a capacitor of 0.01 F is connected in series with a resistor. If the circuit requires 100 Vdcto operatea determine the value of the resistor when time constant is 0.009s.
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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
In an ac circuit with inductive reactance ?, the
A. Phase angle of the circuit is always 45�
B. Voltage across the inductance must be 90� out o f-phase witht he applied voltage
C. Current through the inductance lags its induced voltage by 90�
D. Current through the inductance and voltage across it are180� outof-phase
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4
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
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4
What dielectric is generally employed by a variable capacitor?
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4
Which of the following has negative temperature coefficient?
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4
A law which states that when a constant electromotive force is applied to a circuit consisting of a resistor and capacitor connected in seriesa the time taken for the potential on the plates of the capacitor to rise to any given fraction of its final value depends only on the product of capacitance and resistance.
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4
In an ac wavea 30 degrees of phase is ___ of a cycle.
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4
What is the specific resistance of a pure germanium?
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4
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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4
High resistance values are a consequence of the ___ of the film.
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4
If a capacitor is rated for 200V dca what is its effective ac working voltage?
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4
Which of the following is not a factor affecting capacitance oor?
C. Distance between plates
D. Dielectric material used
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Norton�s theorem is ____ Thevenin�s theorem.
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A capacitance of 0.05 F equals