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Current Affairs January 2024

What is the correct answer?

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

Correct Answer :

A. The value of the impedance is minimum


Related Questions

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As applied to a series RLCcircuita bandwidth means

A. The frequency range for maximum power transfer

B. The difference between the highest and lowest frequencies of the oscillator

C. The separation of the half-power points

D. The frequency at which XL= XC

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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

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

What is a rotating vector whose projection can represent either current or voltage in an ac circuit?

A. Polar diagram

B. Scalar quantity

C. Velocity

D. Phasor

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4

The Q-factor of a series resonant circuit is also known as

A. Current magnification factor

B. Voltage magnification factor

C. Load factor

D. Leakage factor

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4

In a multiple capacitora the plate area is

A. Increased

B. The same

C. Decreased

D. Variable

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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

Which statement is true about a passive circuit?

A. A circuit with neither a source of current nor a source of potential difference

B. A circuit with a voltage source

C. A circuit with a current source

D. A circuit with only resistance as a load

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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

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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4

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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4

Which of the following is the peakiest?

A. Square wave

B. Sinusoidal wave

C. Triangular wave

D. Rectangular wave

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4

The value of temperature coefficient ( ) is dependent upon

A. The nature of material and temperature

B. The length of material

C. The cross-sectional area of the material

D. The volume of the material

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4

A circuit whose parameters change with voltage or current.

A. Non-linear circuit

B. Linear circuit

C. Complex circuit

D. Passive circuit

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4

What is the other name of relative permittivity?

A. Dielectric strength

B. Potential gradient

C. Breakdown voltage

D. Specific inductance capacity

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4

The graph between an alternating quantity and time is called

A. Sine wave

B. Curve

C. Waveform

D. A plot

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4

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

A. ½

B.

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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

According to Gauss theorema flux can be equated to

A. Charge

B. Field intensity

C. Current

D. Voltage

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4

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

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4

When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater than air dielectric. The dielectric constant of ceramic therefore is

A.

B.

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4

In a rectangular wavea the form factor is

A.

B.

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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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4

If an emf in circuit A produces a current in circuit Ba then the same emf in circuit Bproduces the same current in circuit ? this theorem is known as

A. Maximum power transfer theorem

B. Millman�s theorem

C. Reciprocity theorem

D. Norton�s theorem

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4

What is the peak factor for alternating current or voltage varying sinusiodally?

A.

B.

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4

Two capacitors of capacitance 9 F and 18 F in series will have a total capacitance of

A. 27 F

B. 162 F

C. 6 F

D. 180 F

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4

With double the number of turns by the same length and areaa the inductance is

A. The same

B. Doubled

C. Quartered

D. Quadrupled

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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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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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What is the half-power bandwidth of a parallel resonant circuit which has a resonant frequency of 3.6 MHz and Q of 218?

A. 1.65 kHz

B. 16.5 MHz

C. 16.5 kHz

D. 165 kHz