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4

An impedance given by 90 -45� is a/an ___ impedance.

A. Inductive

B. Conductive

C. Resistive

D. Capacitive

Correct Answer :

D. Capacitive


Related Questions

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4

A wire of one kilometre length has a resistance of 20 . If the length is halveda then the new resistance is ___ the original resistance.

A. Half

B. Twice

C. One-fourth

D. Three times

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4

When two in-phase sine waves that have identical frequency and amplitude are added togethera then the result is a sine wave with ___ the amplitude of either.

A. Half

B. Twice

C. Four times

D. One-fourth

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4

A capacitance of 6 ��F means

A. 6 pF

B. 6 nF

C. 6 fF

D. 6 aF

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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

Which of the statements below is not true?

A. Current source is an active element

B. Resistor is a linear element

C. Voltage source is a passive element

D. Diode is a non-linear element

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4

The current is ____ times the maximum current at half-power points of a resonance curve.

A.

B.

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4

What is the purpose of a load in an electric circuit?

A. To increase the circuit current

B. To decrease the circuit current

C. To utilize electrical energy

D. To make the circuit complete

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4

The symbol Q refers to

A. Resonance quotient

B. Quality factor

C. Power quotient

D. Qualification test

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4

It is impossible to change the voltage across a capacitor instantlya as this would produce ___ current.

A. Infinite

B. Zero

C. Low

D. High

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4

When two complex conjugates are subtracteda the result is a

A. Quadrature component only

B. Complex component

C. In-phase component

D. Real component

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4

A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor has a resistance of 20a000 ohms?

A.

B.

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4

What theorem is usually used in the analysis of transistor circuit?

A. Superposition theorem

B. Millman�s theorem

C. Thevenin�s theorem

D. Norton�s theorem

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4

If a multiplate capacitor has 10 platesa each of area 10 cm2a then

A. 10 capacitors will be in parallel

B. 10 capacitors will be in series

C. 9 capacitors will be in parallel

D. 9 capacitors will be in series

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4

An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive reactance of 15 . If a current of 1 ampere is flowinga what is the applied voltage

A. 320 V

B. 32 V

C. 220 V

D. 22 V

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4

An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.

A. Manganin

B. Constantan

C. Nichrome

D. German silver wire

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4

Which waveform in which the rms value and the mean value are equal?

A. Square wave

B. Triangular wave

C. Sine wave

D. Sawtooth

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4

For a linear circuita ___ voltage or current is used to calculate average power.

A. Rms

B. Peak

C. Average

D. Instantaneous

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4

VL= VCin a series RLCcircuit when

A. The value of the impedance is minimum

B. The power factor is zero

C. The current leads the total voltage by 90�

D. The total voltage is zero

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4

What increases the resistance of wire at high frequencies?

A. Temperature

B. Voltage

C. Skin effect

D. Insulation

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4

Which of the following does not affect resistance?

A. Resistivity

B. Cross-sectional area

C. Mass

D. Length

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4

Which of the following does not refer to electrical energy?

A. Volt-ampere

B. Joule

C. Watt-second

D. Volt-coulomb

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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

The hot resistance of an incandescent lamp is about ___ times its cold resistance.

A.

B.

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4

What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red

A. 190 ; 10 %

B. 19 k ; 2 %

C. 19 k ; 20 %

D. 1.9 k ; 2 %

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4

High resistance values are a consequence of the ___ of the film.

A. Thickness

B. Length

C. Thinness

D. Area

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4

In a series RLCcircuit

A. Increasing the frequency decreases the resistance

B. Increasing the frequency increases the resistance

C. Both XLand XCchange as frequency changes

D. Impedance will always decrease

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4

What is the efficiency under the conditions of maximum power transfer?

A.

B.

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4

According to Gauss theorema flux can be equated to

A. Charge

B. Field intensity

C. Current

D. Voltage

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4

The farad is not equivalent to which of the following combination of units

A. CV2

B. C2/J

C. C/V

D. J/V2

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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