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Current Affairs January 2024

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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

Correct Answer :

A. Faradic current


Related Questions

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4

Series resonance occurs when

A. XL= XC

B. XL= R

C. Z = R

D. Both A and C

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4

The electric field strength between capacitor plates has a unit

A. Volts per meter

B. Volts per mil

C. Amperes per meter

D. Amperes per mil

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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

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

A.

B.

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4

In a rectangular wavea the peak factor is

A.

B.

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4

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

What refers to such work at very low temperaturesa near absolute zero?

A. Cryogenics

B. Superconductivity

C. Subsonic

D. Thermionic

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4

Which of the following is the statement of Ohm�s law?

A. Electric current is directly proportional to both voltage and resistance

B. Electric current varies directly as the voltage and inversely as the resistance

C. Electrical power is directly proportional to the resistance and inversely as the current squared

D. Electrical power is directly proportional to both voltage squared and the resistance

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4

Resistor with colored bands in the body

A. Wire-wound resistor

B. Carbon-composition resistor

C. Potentiometer

D. Rheostat

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4

If the inductance is decreaseda the impedance of the circuit containing a resistor a capacitor and an inductor connected in series to an ac source

A. Decreases

B. Increases

C. Decreases or increases

D. Decreasesa increases or remains the same

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4

Conventional flow assumes charges flow from

A. Positive to negative

B. Positive to positive

C. Negative to positive

D. Negative to negative

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4

Which of the following is also known as antiresonant circuit?

A. Parallel resonant circuit

B. Series resonant circuit

C. Tuned circuit

D. Tank circuit

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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

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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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 other name of relative permittivity?

A. Dielectric strength

B. Potential gradient

C. Breakdown voltage

D. Specific inductance capacity

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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

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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4

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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4

What increases the resistance of wire at high frequencies?

A. Temperature

B. Voltage

C. Skin effect

D. Insulation

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4

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

A. Polar

B. Rectangular

C. Trigonometric

D. Exponential

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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

What fusion of elements is without chemical action between them?

A. Mixture

B. Compound

C. Alloy

D. Ionization

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4

Which is considered as the effect of a dielectric material?

A. Increasing capacitance

B. Decreasing capacitance

C. Reducing the working voltage

D. Increasing the distance between the plates

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4

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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4

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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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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4

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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4

An electric circuit contains

A. Passive elements

B. Active elements

C. Both active and passive elements

D. Reactive elements

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4

What is the specific resistance of a pure silicon?

A. 55 -mm

B. 55 -m

C. 55 -cm

D. 55 k -m