Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | At____ frequencies the parallel R-L circuit behaves as purely resistive. |

A. | Low [Wrong Answer] |

B. | Very low [Wrong Answer] |

C. | High [Wrong Answer] |

D. | Very high [Correct Answer] |

View Answer
Explanation:-
Answer : DDiscuss it below :Mehul Vanzara Said on 2020-10-03 21:22:27Capacitors for power factor
correction are rated in !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ For a sine wave with peak value I

_{max}the r.m.s. value is

0.5 I

_{max}

0.707 I

_{max}

0.9 I

_{max}

1.414 I

_{max}

⇒ The power factor of a D.C. circuit is always

Less than unity

Unity

Greater than Unity

Zero

⇒ The value of operator j2 is equal to

Zero

+1

-1

√-1

⇒ The time period of a sine wave is 1/50 seconds. Its frequency is

20 Hz

30 Hz

40 Hz

50 Hz

⇒ The dual of a link is

Twig

Node

Loop

Tree branch

⇒ When an alternating current passes through an ohmic resistance the electrical power converted into heat is

Apparent power

True power

Reactive power

None of the above

⇒ In a series resonant circuit, the impedance of the circuit is

Minimum

Maximum

Zero

None of the above

⇒ A resonance curve for a series circuit is a plot of frequency versus

Current

Voltage

Impedance

Reactance

⇒ 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

⇒ A sine wave of voltage varies from zero to maximum of 200 V. How much is the voltage at the instant of 30° of the cycle ?

50V

82.8V

100V

173.2 V

⇒ In an A.C. circuit I sin Φ is called

Active component

Wattless component

Any of the above

None of these

⇒ A network is said to be non-linear if it does not satisfy

Homogeneity condition

Superposition condition

Both (A) and (B)

Associative condition

⇒ Power factor of electric bulb is

Zero

Lagging

Leading

Unity

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

Resistance only

Inductance only

Capacitance only

None of the above

⇒ Which of the following statement is incorrect ?

Resistance is a passive element

Voltage source is an active element

Conductance is a passive element

Current source is a passive element

⇒ Poor power factor results in all of the following EXCEPT.

Overloading of transformers

Overloading of altemators

Reduction in power losses

Reduction in load handling capacity of electrical system

⇒ 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

⇒ The power factor of incandescent bulb is

0.8 lagging

0.8 leading

Unity

Zero

⇒ The shunt element in a band pass filter is

Capacitive

Inductive

Parallel combination of L and C

Series combination of L and C

⇒ 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

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

Cycle

Cycle-sec

Hertz

Hertz/sec

⇒ The r.m.s. value of a sine wave is 100A. Its peak value is

70.7 A

141.4A

150A

282.8 A

⇒ The frequency of domestic power supply in India is

200 Hz

100 Hz

60 Hz

50 Hz

⇒ The r.m.s. value of pure cosine function is

0.5 of peak value

0.707 of peak value

Same as peak value

Zero

⇒ 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

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

Mean value

r.m.s. value

Peak value

Average value

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

Impedance

Susceptance

Quality factor

Selectivity

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

Zero

0.5

Unity

Infinite

⇒ 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