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4

For a series circuita the higher the quality factor

A. The greater the bandwidth

B. The narrower the passband

C. The broader the resonance curve

D. The wider the passband

Correct Answer :

B. The narrower the passband


Related Questions

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4

In an inductive coila the rate of rise of current is maximum

A. Near the final maximum value of current

B. At midvalue of current

C. At half-power points

D. After one time constant

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4

Which of the following capacitors are used only in dc circuits?

A. Mica

B. Ceramic

C. Mylar

D. Electrolytic

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4

The temperature-resistance coefficient of pure gold is

A.

B.

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4

The distance between the capacitor plates increases two timesa then its capacitance

A. Increases two times

B. Increases four times

C. Decreases two times

D. Decreases four times

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4

For a series circuita the higher the quality factor

A. The greater the bandwidth

B. The narrower the passband

C. The broader the resonance curve

D. The wider the passband

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4

A series RLCcircuit has a ______ power factor at its half-power points

A. Unity

B. Leading

C. Lagging

D. Either B or C

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4

In a complex resistance-reactance planea XLis represented

A. By an axis opposite the R axis

B. By an axis perpendicular to the XC axis

C. By an axis opposite the XCaxis

D. By an axis parallel to the R axis

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4

What value of R is needed with a 0.05 F Cfor an RCtime constant of 0.02 s?

A.

B. 400 M

C. 400 G

D. 400 k

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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

A. One-half

B. One-fourth

C. Two times

D. Four times

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4

The ratio between the reactive power and the apparent power of an ac load is called

A. Quality factor

B. Power factor

C. Power ratio

D. Reactive power

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4

What maximum voltage can be applied across the capacitor of time?

A. Working voltage

B. Surge voltage

C. Stray voltage

D. Peak voltage

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4

The reactance curve is a plot of frequency versus _____ for a series RLCcircuit

A. Current

B. Voltage

C. Gain

D. Impedance

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4

An inductor carries 2 A dc. If its inductance is 100 Ha then what is its inductive reactance?

A. Zero

B. 1.3 k

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4

A rheostat is a form of

A. Variable resistor

B. Variable capacitor

C. Potentiometer

D. Thermocouple

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4

What is the specific resistance of a pure silicon?

A. 55 -mm

B. 55 -m

C. 55 -cm

D. 55 k -m

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4

What is the most convenient way of achieving large capacitance?

A. By using multiplate construction

B. By using air as dielectric

C. By decreasing distance between plates

D. By using dielectric of low permittivity

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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

D. All of the above

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4

The charge in the capacitor is stored at the

A. Terminals

B. Plates

C. Dielectric

D. Air

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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

A. 10 +j 5

B. 10 + j 10

C. 10 ± j 5

D. 10 ± j 10

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4

What is the peak factor of a triangular wave?

A.

B.

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4

An open resistor when checked with an ohmmeter reads

A. Zero

B. Infinite

C. High but within the tolerance

D. Low but not zero

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4

The reciprocal of a complex number is

A. A complex number

B. A real number

C. An imaginary number

D. A whole number

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4

An intermittent and non-symmetrical alternating current like that obtained from the secondary winding of an induction coil

A. Faradic current

B. Transient ac current

C. Inductive current

D. Capacitive current

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4

The impedance in the study of electronics is represented by resistan

A. Inductance

B. Capacitance

C. Inductance and capacitance

D. Reactance

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4

Which of the following conditions is not true for a series RLCcircuit at resonance?

A. Z = jXL

B. XL= XC

C. The power factor is one

D. The magnitude of Z is

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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

A gang capacitor is a variable capacitor in which capacitance is varied by changing the

A. Dielectric

B. Number of plates

C. Plate area

D. Distance between plates

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4

What theorem is generally used in the analysis of vacuum tubes?

A. Superposition theorem

B. Millman�s theorem

C. Thevenin�s theorem

D. Norton�s theorem

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4

A capacitor consists of two

A. Conductors only

B. Dielectric only

C. Conductors separated by a dielectric

D. Dielectric separated by a conductor

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4

In an RL series circuita

A. Current lags voltage by less than 90�

B. Current lags voltage by 180�

C. Current lags voltage by 90�

D. Current leads voltage by 90�