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What is the conductance of a circuit having three 10 resistors in parallel?

A. 0.3 S

B. 3.33 S

C. 0.33 S

D. 30 S

Correct Answer :

A. 0.3 S


Related Questions

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A real current source has

A. Infinite internal resistance

B. Zero internal resistance

C. Large internal resistance

D. Small internal resistance

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When two pure sine waves of the same frequency and the same amplitude which are exactly 180� outof-phase are added togethera the result is

A. A wave with twice the amplitude

B. A wave with half the amplitude

C. Zero signal

D. A wave with twice the frequency

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4

In liquids and gasesa ionization current results from a flow of

A. Positive or negative ions

B. Free electrons

C. Ions that are lighter in weight than electrons

D. Protons

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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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Which of the following describes the action of a capacitor?

A. Stores electrical energy

B. Opposes changes in current flow

C. Creates a dc resistance

D. Converts ac to dc

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And ideal current source has an internal conductance of _____ siem

A. Infinite

B. One

C. Zero

D. One million

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In an ac wavea 30 degrees of phase is ___ of a cycle.

A. ½

B.

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What determines the magnitude of electric current?

A. The rate at which electrons are produced

B. The type of material used

C. The current carrying capacity of the circuit

D. The rate at which electrons pass a given point

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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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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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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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What is the total resistance of a two equal valued resistors in series?

A. The difference of both

B. The product of both

C. Twice as one

D. The sum of their reciprocals

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What is the peak factor of a triangular wave?

A.

B.

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Which of the following is not a factor affecting capacitance oor?

A. Area of plates

B. Number of plates

C. Distance between plates

D. Dielectric material used

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If two resistances of 9 and 6 are connected in parallela the total resistance is

A.

B.

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A term used to express the amount of electrical energy stored in electrostatic field.

A. Joules

B. Coulombs

C. Watts

D. Electron-volt

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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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In a series RLCcircuit

A. The current lags VLby 90�

B. The current leads VLby 90�

C. XL leads Xcby 90�

D. Z = jXL at resonance

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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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The voltage lags the current by cycle in a

A. Purely resistive circuit

B. Purely inductive circuit

C. Purely capacitive circuit

D. Circuit containing resistancea capacitance and inductance

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An open inductor has

A. Zero resistance and infinite inductance

B. Infinite resistance and zero inductance

C. Infinite resistance and infinite inductance

D. Zero resistance and zero inductance

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Which of the following does not affect resistance?

A. Resistivity

B. Cross-sectional area

C. Mass

D. Length

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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.

A. 40 H

B. 40 mH

C. 40 pH

D. 40 nH

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The rms value of a triangular or sawtooth waveform is ___ tim value.

A.

B.

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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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The ohmic value of a resistor with negative temperature coefficient

A. Increases with increasing temperature

B. Increase with decreasing temperature

C. Stays unchanged with temperature change

D. Stays unaffected even with increasing temperature

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In calculating maximum instantaneous power ___ voltage or current is used.

A. Peak

B. Average

C. Rms

D. Instantaneous

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Rationalizing the denominator of a complex number means

A. Eliminating the j component in the denominator

B. Adding j component in the denominator

C. Eliminating the j component in the numerator

D. Adding j component in the numerator

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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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When two unequal values of resistors are connected in parallel across a dc sourcea greater current flows through the

A. Higher resistance

B. Lower resistance

C. Higher wattage resistance

D. Lower wattage resistance