Home
Current Affairs January 2024

What is the correct answer?

4

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°

Correct Answer :

B. Voltage across R lags the voltage across XLby 90°


Related Questions

What is the correct answer?

4

Which of the following capacitors is suitable for dc filter circuits?

A. Mica

B. Ceramic

C. Paper

D. Electrolytic

What is the correct answer?

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

What is the correct answer?

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

What is the correct answer?

4

The graph between an alternating quantity and time is called

A. Sine wave

B. Curve

C. Waveform

D. A plot

What is the correct answer?

4

Kirchhoff�s laws (KCL and KVL) are applicable to

A. DCcircuits

B. ACcircuits

C. DC as well as AC circuits

D. Passive networks alone

What is the correct answer?

4

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

What is the correct answer?

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

What is the correct answer?

4

What does a capacitor store?

A. Voltage

B. Charge

C. Current

D. Power

What is the correct answer?

4

Thevenin�s theorem is what form of an equivalent circuit?

A. Current

B. Voltage

C. Both current and voltage

D. Neither current nor voltage

What is the correct answer?

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

What is the correct answer?

4

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

A. ½

B.

What is the correct answer?

4

Property of an electric circuit that dissipates electric energy

A. Reactance

B. Impedance

C. Resistance

D. Conductance

What is the correct answer?

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

What is the correct answer?

4

The charging of a capacitor through a resistance follows what law?

A. Linear law

B. Hyperbolic law

C. Inverse-square law

D. Exponential law

What is the correct answer?

4

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

What is the correct answer?

4

What is the reciprocal of capacitance?

A. Reluctance

B. Susceptance

C. Elastance

D. Conductance

What is the correct answer?

4

For a linear circuita ___ voltage or current is used to calculate average power.

A. Rms

B. Peak

C. Average

D. Instantaneous

What is the correct answer?

4

For a parallel ACcircuita ___ is used as a reference phasor.

A. Voltage

B. Power

C. Current

D. Resistance

What is the correct answer?

4

In Norton�s theorema the short circuit current is obtained by

A. Opening the load terminals

B. Shorting the load terminals

C. Opening the voltage source

D. Shorting the voltage source

What is the correct answer?

4

What is the value of a carbon composition resistor with the following color code: Browna whitea orangea red

A. 190 ; 10 %

B. 19 k ; 2 %

C. 19 k ; 20 %

D. 1.9 k ; 2 %

What is the correct answer?

4

What is the most common non-sinusoidal waveform?

A. Square wave

B. Triangular wave

C. Trapezoidal wave

D. Sawtooth wave

What is the correct answer?

4

Which of the following is a preferred resistor value?

A.

B.

C. 43a000

D. 54a321

What is the correct answer?

4

For maximum power transfera what is the relation between load resistance RL and internal resistance R of the voltage source?

A. RL= 2 r

B. RL= 1.5 r

C. RL= r

D. RL= 3 r

What is the correct answer?

4

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

What is the correct answer?

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

What is the correct answer?

4

What is the resonant frequency of a circuit when L of 3 microhenrys and C of 40 picofarads are in series?

A. 14.5 kHz

B. 145 MHz

C. 14.5 MHz

D. 145 kHz

What is the correct answer?

4

The average value of a triangular or sawtooth wave is _____ times its peak value.

A.

B.

What is the correct answer?

4

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

What is the correct answer?

4

The ratio between the active power and the apparent power of a load in an ac circuit is called

A. Quality factor

B. Power factor

C. Power ratio

D. Power reactive

What is the correct answer?

4

The second strip of an electronic resistor color-code represents

A. The multiplier

B. The second digit of the value

C. The temperature

D. The tolerance