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4

Which of the following dielectric materials makes the highest-capacitance capacitor?

A. Air

B. Barium-strontium titanite

C. Mica

D. Electrolyte

Correct Answer :

B. Barium-strontium titanite


Related Questions

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In adding or subtracting phasor quantitiesa ___ form is the most convenient.

A. Polar

B. Rectangular

C. Trigonometric

D. Exponential

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A capacitor is basically constructed of

A. Two conductors separated by a dielectric

B. Two dielectric separated by a conductor

C. Conductors and dielectric

D. Conductors and semiconductors

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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 rating of a resistor determines its ability to absorb heat?

A. Wattage

B. Ohmic

C. Current

D. Voltage

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The resistance of an insulator ___ when its temperature is increased.

A. Decreases

B. Remains the same

C. Increases

D. Varies

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Inductive reactance applies only to sine waves because it

A. Increases with lower frequencies

B. Increases with lower inductance

C. Depends on the factor 2

D. Decreases with higher frequencies

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A resistor wound with a wire doubled back on itself to reduce the inductance.

A. Bifilar resistor

B. Wire-wound resistor

C. Anti-inductive resistor

D. Bleeder resistor

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4

What is the total capacitance of 10 capacitorsa each of 20 F in series?

A. 200 F

B. 2 F

C. 100 F

D. 0.5 F

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4

The unit of elastance is

A. Farad

B. Daraf

C. Siemen

D. Henry

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Which of the following is not considered a physical factor affecting resistance?

A. Length

B. Material type

C. Temperature

D. Cross-sectional

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4

For parallel 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

An inductive load always has a ___ power factor

A. Leading

B. Lagging

C. Zero

D. Unity

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The symbol Q refers to

A. Resonance quotient

B. Quality factor

C. Power quotient

D. Qualification test

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Which statement is true?

A. A series resonant circuit is of high impedance

B. A parallel resonant circuit is of low impedance

C. A series resonant circuit is inductive if it operates at a frequency higher than the resonant frequency

D. A parallel resonant circuit is inductive if it operates at a frequency higher than the resonant frequency

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The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.

A. Algebraic

B. Arithmetic

C. Vector

D. Phasor

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When capacitors are connected in seriesa the total capacitance is

A. Smaller than the smallest capacitor

B. Smaller than the largest capacitor

C. Greater than any of the capacitor

D. Greater than the largest capacitor

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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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Liquids that are good conductors because of ionization are called

A. Electrolytic

B. Bases

C. Acid

D. Electrolytes

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The temperature coefficient of resistance of electrolytes is

A. Negative

B. Positive

C. Zero

D. Infinite

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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

Which of the following dielectric materials makes the highest-capacitance capacitor?

A. Air

B. Barium-strontium titanite

C. Mica

D. Electrolyte

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4

The charging of a capacitor through a resistance obeys

A. Exponential law

B. Logarithmic law

C. Linear law

D. Square law

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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?

A. 10.1 kHz

B. 10.1 MHz

C. 101 MHz

D. 101 kHz

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4

A switch designed to have low capacitance between its terminal when open.

A. LOCAP switch

B. AntiLOCAP switch

C. Anticapacitance switch

D. Capacitance switch

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When resistance are connected in parallela the total resistance is

A. Less than the smallest resistance in the connection

B. Greater than the smallest resistance in the connection

C. Between the smallest and greatest resistance in the connection

D. Increasing and decreasing depending upon the supply voltage

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Series resonant circuit is sometimes known as

A. Rejector circuit

B. Acceptor circuit

C. Inductive circuit

D. Capacitive circuit

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In an ac circuita the power dissipated as heat depends on

A. Impedance

B. Capacitive reactance

C. Resistance

D. Inductive reactance

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Permeability is otherwise known as

A. Magnetic conductivity

B. Magnetic susceptibility

C. Electric conductivity

D. Electric susceptibility

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What can be used to estimate resonant frequency and to find reactance at any frequency for any value of capacitor or inductor?

A. Smith chart

B. Reactance chart

C. Impedance chart

D. Resonance chart

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Another term of the quality factor of the resonant circuit.

A. Figure of merit

B. Figure of demerit

C. Noise factor

D. Noise figure