Related Questions
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4
The superposition theorem is used when the circuit contains
C. Number of voltage sources
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4
What theorem is usually used in the analysis of transistor circuit?
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4
The ratio between the reactive power and the apparent power of an ac load is called
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4
The Q-factor of a parallel resonant circuit is also known as
A. Current magnification factor
B. Voltage magnification factor
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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
The resistance of an insulator ___ when its temperature is increased.
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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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4
What is the conductance of a circuit having three 10 resistors in parallel?
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4
The factor 0.707for converting peak to rms applies only to
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4
What is a rotating vector whose projection can represent either current or voltage in an ac circuit?
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4
Transient period is considered over after
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For a parallel ACcircuita ___ is used as a reference phasor.
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4
A series RL circuit has R of 10 and XL of 5 a its impedance in rectangular form is given by
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4
Under the conditions of maximum power transfera a voltage source is delivering a power of 15 W to the load. What is the power generated by the source?
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4
Delta to wye or wye to delta transformation technique is applied to a ___ network.
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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
The reciprocal of a complex number is
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4
When capacitors are connected in parallela the total capacitance is
A. Greater than the largest capacitor
B. Smaller than the largest capacitor
C. Smaller than the smallest capacitor
D. Greater than the smallest capacitor
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4
A capacitor of 0.5 F charged to 220 V is connected across an uncharged 0.5 F capacitor. What is the voltage across each capacitor?
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4
In an ac circuit with XL and R in seriesa the
A. Voltages across R and XL are in phase
B. Voltage across R lags the voltage across XLby 90°
C. Voltages across R and XL are 180° outof-phase
D. Voltage across R leads the voltage across XLby 90°
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4
The reason why electrical appliances are connected in parallel.
A. It is a simple circuit
B. This makes the operation of appliances independent with each other
C. This results in reduced power consumption
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4
An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil
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4
If a certain circuit has a current that is lagging the voltage by 45�a then it displays
A. Pure inductive reactance
B. Resistance and capacitance reactance
C. Resistance and inductive reactance
D. Pure capacitive reactance
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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
A neon glow lamp used as a night light ionizes at approximately
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4
Why are inductance and capacitance not relevant in a dc circuit?
A. Because it is a simple circuit
B. Because dc circuits require only resistance as load
C. Because they do not exist in a dc circuit
D. Because frequency of dc is zero
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4
When two complex conjugates are subtracteda the result is a
A. Quadrature component only
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4
The area of capacitor plates increases two timesa then its capacitance
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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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For a carbon composition resistora typical resistance values range from