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Current Affairs January 2024

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Which component opposes voltage change?

A. Resistor

B. Inductor

C. Capacitor

D. Transistor

Correct Answer :

C. Capacitor


Related Questions

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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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Which of the following conditions is not true for a series RLCcircuit at resonance?

A. Z = jXL

B. XL= XC

C. The power factor is one

D. The magnitude of Z is

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What is the specific resistance of a pure germanium?

A. 55 -cm

B. 55 -m

C. 55 -mm

D. 55 k -m

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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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A switch designed to have low capacitance between its terminal when open.

A. LOCAP switch

B. AntiLOCAP switch

C. Anticapacitance switch

D. Capacitance switch

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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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The internal resistance of an ideal current source is

A. Infinite

B. Zero

C. Equal to the load resistance

D. To be determined

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At what frequency will the current in a series RLCcircuit reach its maximum value for an applied voltage of 15 V with R = 500 a L = 100 H and C= 0.001 F?

A. 503 kHz

B. 403 kHz

C. 603 kHz

D. 303 kHz

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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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A capacitor requires 12 C of charge to raise its potential of 3 V. What is the capacitance of the capacitor?

A. 36 F

B. 15 F

C. 0.25 F

D. 4 F

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Form its definitiona the unit of electric fielda is the N/C and equivalent unit of is the

A. V(m)2

B. V(m)

C. V/m2

D. V/m

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When the power factor of a circuit is zeroa

A. Power absorbed is maximum

B. Power absorbed is minimum

C. Power absorbed is zero

D. The impedance is minimum

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What is the temperature coefficient of the resistance Eureka?

A. Infinity

B. Negative

C. Almost zero

D. Positive

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

A. Cryogenics

B. Superconductivity

C. Subsonic

D. Thermionic

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What is the specific resistance of a pure silicon?

A. 55 -mm

B. 55 -m

C. 55 -cm

D. 55 k -m

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A tank circuit is a

A. Parallel LC circuit

B. Series LCcircuit

C. A resonant circuit

D. A non-resonant circuit

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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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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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Tungsten filament of bulbs has a hot resistance higher than its cold resistance due to its temperature coefficient which is

A. Positive

B. Negative

C. Zero

D. Infinite

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If three 9 mH inductors are connected in parallel without mutual inductance then the total i nductance is

A. 3 mH

B. 9 mH

C. 27mH

D. 18 mH

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The wavelength of an alternating waveform depends upon the ___ of the variation.

A. Period

B. Number

C. Frequency

D. Amplitude

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What is the reading of an ohmmeter for a shorted capacitor?

A. Zero

B. Infinity

C. k

D. M

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What is the most common non-sinusoidal waveform?

A. Square wave

B. Triangular wave

C. Trapezoidal wave

D. Sawtooth wave

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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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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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Norton�s theorem is what form of an ac equivalent circuit?

A. Voltage

B. Current

C. Both voltage and current

D. Neither voltage nor current

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A three-by-threea series-parallel matrix of resistorsa all having the same ohmic valuea would have a net resistance of

A. One-third the value of a single resistor

B. Three times the value of a single resistor

C. The same value as a single resistor

D. Nine times the value of a single resistor

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For a carbon composition resistora typical resistance values range from

A. 2.7 to 22 M

B. 1000 to 10000

C. 10 to 10 M

D. 2.7 to 2.7G

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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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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