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What is expected when two 20 k a 1 watt resistor in parallel are use instead of one 10 k a 1 watt?

A. Provides higher current

B. Provides less power

C. Provides more power

D. Provides wider tolerance

Correct Answer :

C. Provides more power


Related Questions

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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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The mutual inductance between two coils is ___ the reluctance of magnetic path.

A. Directly proportional to

B. Inversely proportional to

C. Independent to

D. Equal to

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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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An inductive load always has a ___ power factor

A. Leading

B. Lagging

C. Zero

D. Unity

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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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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?

A. 60 W

B. 30 W

C. 15 W

D. 4 W

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A neon glow lamp used as a night light ionizes at approximately

A. 70 V

B. 80 V

C. 90 V

D. 100 V

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What does a capacitor store?

A. Voltage

B. Charge

C. Current

D. Power

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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

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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The curve between current and frequency is termed as

A. Voltage curve

B. Gain curve

C. Power curve

D. Resonance curve

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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

If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will

A. Decrease by 2 C

B. Increase by 2 C

C. Decrease by 4 C

D. Increase by 4C

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4

The presence of an electric current is made known by

A. Electric shock

B. Effects produced

C. Magnetic shock

D. Flashing

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How many degrees of phase represents one full cycle?

A.

B.

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Which of the following is a preferred resistor value?

A.

B.

C. 43a000

D. 54a321

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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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Refers to the outward-curving distortion of the lines of force near the edges of two parallel metal plates that form a capacitor.

A. Skin effect

B. Night effect

C. Edge effect

D. Hall effect

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Effects of capacitance

A. It opposes any change in the amount of voltage

B. Voltage is lagged behind the current by a quarter cycle

C. Electric energy is stored in the capacitor in the form of electrostatic field

D. All of the above

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A capacitive load always has a ______ power facto

A. Leading

B. Lagging

C. Zero

D. Unity

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4

The reason why electrical appliances are not connected in series.

A. Greater electrical power saving

B. Power loss is minimum

C. Appliances have different current ratings

D. All of the above

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Two complex numbers or phasors are said to be conjugate if they

A. Differ only in the algebraic sign of their quadratic components

B. Differ only in the algebraic sign of their real components

C. Are equal in their real and quadrature components including alge

D. Are equal in their real components but differ in their quadrature components i ncluding algebraic signs.

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In an ac circuit with a resistive branch and an inductive branch in parallela the

A. Voltage across the inductance leads the voltage across the resistance by 90°

B. Resistive branch current is 90° out of phase with the inductive branch current

C. Resistive and inductive branch currents have the same phase

D. Resistive and inductive branch currents are 180° outof-phase

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4

If a capacitor is rated for 200V dca what is its effective ac working voltage?

A. 50 V

B. 100 V

C. 200 V

D. 400 V

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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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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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A series-parallel combination of identical resistors will

A. Increase the power rating compared with one resistor alone

B. Increase the voltage rating compared with one resistor alone

C. Reduce the voltage rating compared with resistor alone

D. Result in an expensive circuit

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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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Which of the following does not generally affect the value of a capacitor?

A. The dielectric material used

B. The surface area of the plates

C. The thickness of the dielectric

D. The voltage applied to the plate

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What is the reciprocal of quality factor?

A. Power factor

B. Reactive factor

C. Dissipation factor

D. 1/Q factor