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Q1. | Capacitors for power factor correction are rated in |

A. | kW [Wrong Answer] |

B. | kVA [Wrong Answer] |

C. | kV [Wrong Answer] |

D. | kVAR [Correct Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ The power factor at resonance in RLC parallel circuit is

Zero

0.08 Lagging

0.8 Leading

Unity

⇒ The double energy transient occur in the

Purely inductive circuit

R-L circuit

R-C circuit

R-L-C circuit

⇒ The power factor of incandescent bulb is

0.8 lagging

0.8 leading

Unity

Zero

⇒ In an A.C. circuit power is dissipated in

Resistance only

Inductance only

Capacitance only

None of the above

⇒ In a pure resistive circuit

Current lags behind the voltage by 90°

Current leads the voltage by 90°

Current can lead or lag the voltage by 90°

Current is in phase with the voltage

⇒ A heater is rated as 230 V, 10 KW, AC. The value 230 V refers t

Average voltage

r.m.s. voltage

Peak voltage

None of these

⇒ All the rules and laws of D.C. circuit also supply to A.C. circuit containing

Capacitance only

Inductance only

Resistance only

All above

⇒ The unit of frequency of an A.C. signal is

Cycle

Cycle-sec

Hertz

Hertz/sec

⇒ The transient currents are associated with the

Changes in the stored energy in the inductors and capacitors

Impedance of the current

Applied voltage to the circuit

Resistance of the circuit

⇒ The voltage of domestic supply is 220 V. This figure represents-

Mean value

r.m.s. value

Peak value

Average value

⇒ If resistance is 20 ω and inductance is 2H in a RL series circuit, then time constant of this circuit will be

0.001 S

0.1 S

10 S

100 S

⇒ The best place to install a capacitor is

Very near to inductive load

Across the terminals of the inductive load

Far away from the inductive load

Any where

⇒ In a parallel R-C circuit, the current always ____the applied voltage.

Lags

Leads

Remains in phase with

None of the above

⇒ For the same peak value which of the following wave will have the highest r.m.s. value ?

Square wave

Half wave rectified sine wave

Triangular wave

Sine wave

⇒ Form factor is the ratio of

Average value/r.m.s. value

Average value/peak value

r.m.s. value/average value

r.m.s. value/peak value

⇒ At very low frequencies a series R-C circuit behaves as almost purely____

Resistive

Inductive

Capacitive

None of these

⇒ For the same peak value of voltage which wave form will have the least r.m.s. value ?

Sine wave

Square wave

Triangular wave

Full wave rectified sine wave

⇒ In A.C. circuit the power curve is a sine wave having

Double the frequency of voltage

Same frequency as that of voltage

Half the frequency of the voltage

None of these

⇒ The product of apparent power and cosine of the phase angle between circuit voltage and current is

True power

Reactive power

Volt-amperes

Instantaneous power

⇒ A parallel resonant circuit can be used

As a high impedance

To reject a small band of frequencies

Both (A) and (B)

To amplify certain frequencies

⇒ The negative maximum of a cosine wave occurs at

30

45

90

180

⇒ The reflection co-efficient of the simplest standing wave is

+1

1

Zero

Infinity

⇒ In a purely inductive circuit

Actual power is zero

Reactive power is zero

Apparent power is zero

None of these

⇒ At____ frequencies the parallel R-L circuit behaves as purely resistive.

Low

Very low

High

Very high

⇒ In the R - L - C containing R = 4.5ω L = 0.06 H,C = 0.6 µF the power factor will be

Zero

Lagging

Leading

Unity

⇒ The ratio of the bandwidth to the resonance frequency is called the____ of the circuit.

Impedance

Susceptance

Quality factor

Selectivity

⇒ For the full wave rectified sine wave the r.m.s. value is

0.707 I

_{max}

0.636 I

_{max}

0.318 I

_{max}

Zero

⇒ How much r.m.s. current does a 300 W. 200V bulb take from the 200 V, 50 Hz power line ?

0.5A

1.5 A

2A

3A

⇒ The form factor of D.C. supply voltage is always

Zero

0.5

Unity

Infinite

⇒ Form factor for a sine wave is

1.414

0.707

1.11

0.637