Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following represents the energy stored in a cap

A. CV2/2

B. 2Q2/C

C. C2/V

D. CV

Correct Answer :

A. CV2/2


Related Questions

What is the correct answer?

4

The potential gradient in a cable is maximum in

A. Conductor

B. Outer sheath

C. Insulation

D. Uniformly all over

What is the correct answer?

4

In a pure capacitancea

A. Current leads voltage by 90�

B. Current leads voltage by 180�

C. Current lags voltage by 90�

D. Current lags voltage by 180�

What is the correct answer?

4

The temperature-resistance coefficient of pure gold is

A.

B.

What is the correct answer?

4

What is the conductance of a circuit having three 10 resistors in parallel?

A. 0.3 S

B. 3.33 S

C. 0.33 S

D. 30 S

What is the correct answer?

4

According to Gauss theorema flux can be equated to

A. Charge

B. Field intensity

C. Current

D. Voltage

What is the correct answer?

4

Barium-strontium titanite dielectric material is also called

A. Ceramic

B. Polyster

C. Electrolytic

D. Bakelite

What is the correct answer?

4

For series capacitorsa total charge is

A. The sum of individual charges

B. Equal to the charge of either capacitors

C. Equal to the product of the charges

D. The quotient of the charges

What is the correct answer?

4

What is the time constant for L of 240 mH in series with R of 20 ?

A. 12 ms

B. 4.8 s

C. 83.3 s

D. 12 s

What is the correct answer?

4

Which of the following is not a factor affecting dielectric strength?

A. Mass

B. Moisture content

C. Temperature

D. Thickness

What is the correct answer?

4

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

What is the correct answer?

4

The distance between the capacitor plates increases two timesa then its capacitance

A. Increases two times

B. Increases four times

C. Decreases two times

D. Decreases four times

What is the correct answer?

4

How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate of 3 A?

A. 2.592 x 105C

B. 2.592 x 103 C

C. 2.592 x 108 C

D. 2.592 x 1012 C

What is the correct answer?

4

The ratio of maximum value to the effective value of an alternating quantity is called

A. Form factor

B. Peak factor

C. Dynamic factor

D. Leakage factor

What is the correct answer?

4

The hot resistance of an incandescent lamp is about ___ times its cold resistance.

A.

B.

What is the correct answer?

4

Which of the following is a disadvantage of a wire-wound resistor?

A. It has reactance in radio-frequency circuits

B. It cannot handle much power

C. It draws a large amount of current

D. It cannot handle high voltage

What is the correct answer?

4

In an ac circuit with inductive reactance ?, the

A. Phase angle of the circuit is always 45�

B. Voltage across the inductance must be 90� out o f-phase witht he applied voltage

C. Current through the inductance lags its induced voltage by 90�

D. Current through the inductance and voltage across it are180� outof-phase

What is the correct answer?

4

The usual load of a dc circuit is a/an

A. Resistor

B. Capacitor

C. Inductor

D. Both inductor and capacitor

What is the correct answer?

4

A factor that states how much the resistance changes for a change in temperature?

A. Resistivity

B. Specific resistance

C. Coefficient of temperature change

D. Temperature coefficient of resistance

What is the correct answer?

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

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

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

What is the correct answer?

4

Which factor does not affect resistance?

A. Length

B. Resistivity

C. Cross-sectional area

D. Mass

What is the correct answer?

4

When capacitors are connected in seriesa the total capacitance is

A. Smaller than the smallest capacitor

B. Smaller than the largest capacitor

C. Greater than any of the capacitor

D. Greater than the largest capacitor

What is the correct answer?

4

What is the resonant frequency of a circuit when L of 25 microhenrys and C of 10 picofarads are in parallel?

A. 10.1 kHz

B. 10.1 MHz

C. 101 MHz

D. 101 kHz

What is the correct answer?

4

A capacitive load always has a ______ power facto

A. Leading

B. Lagging

C. Zero

D. Unity

What is the correct answer?

4

Which of the following does not affect resistance?

A. Resistivity

B. Cross-sectional area

C. Mass

D. Length

What is the correct answer?

4

For a series circuita the higher the quality factor

A. The greater the bandwidth

B. The narrower the passband

C. The broader the resonance curve

D. The wider the passband

What is the correct answer?

4

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

What is the correct answer?

4

A trigger circuit consisting of a capacitor of 0.01 F is connected in series with a resistor. If the circuit requires 100 Vdcto operatea determine the value of the resistor when time constant is 0.009s.

A.

B. 900 k

C. 900 M

D. 900 G

What is the correct answer?

4

Of the equivalent combination of unitsa which one is not equal to watt?

A. 2/V

B. AV

C. A2

D. J/s