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

A. | Current [Correct Answer] |

B. | Voltage [Wrong Answer] |

C. | Impedance [Wrong Answer] |

D. | Reactance [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ 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

⇒ The r.m.s. value of a half-wave rectified current is 100 A. Its value for full-wave rectification would be____ amperes.

141.4

200

200/π

40/π

⇒ The capacitors for power factor correction are rated in terms of

Voltage

VA

kW

kVAR

⇒ Power factor of an inductive circuit is usually improved by connecting capacitor to it in

Parallel

Series

Either (A) or (B)

None

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

Resistive

Inductive

Capacitive

None of these

⇒ 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

⇒ 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

⇒ In A.C. circuit laminated iron is invariably used in order to

Reduce eddy current loss

Increase heat radiation

Make assembly cheap and easier

Reduce circuit permeability

⇒ The power factor at resonance in RLC parallel circuit is

Zero

0.08 Lagging

0.8 Leading

Unity

⇒ The negative maximum of a cosine wave occurs at

30

45

90

180

⇒ A coil with large distributed capacitance has a

High resonant frequency

Low resonant frequency

Low quality factor

Low resistance

⇒ Capacitive reactance is more when

Capacitances is less and frequency of supply is less

Capacitance is less and frequency of supply is more

Capacitance is more and frequency of supply is less

Capacitance is more and frequency of supply is more

⇒ Skin effect occurs when a conductor carries current at____ frequencies.

Very low

Low

Medium

High

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

Low

Very low

High

Very high

⇒ For 200 V r.m.s. value triangular wave, the peak voltage will be

200 V

222 V

282 V

346 V

⇒ 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

⇒ 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

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

0.5 of peak value

0.707 of peak value

Same as peak value

Zero

⇒ The series element of a band stop filter is

Capacitive

Inductive

Parallel combination of L and C

Series combination of L and C

⇒ The ratio of active power to apparent power is known as ____ factor.

Demand

Load

Power

Form

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

Cycle

Cycle-sec

Hertz

Hertz/sec

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

Less than unity

Unity

Greater than Unity

Zero

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

Capacitance only

Inductance only

Resistance only

All above

⇒ Which of the following circuit component opposes the change in the circuit voltage

Inductance

Capacitance

Conductance

Resistance

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

Minimum

Maximum

Zero

None of the above

⇒ 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

⇒ At half power points of a resonance curve, the current is____ times the maximum current.

1/2

1/ √2

√2

2

⇒ Which of the following waves has the highest value of peak factor '?

Square wave

Sine wave

Half wave rectifier sine wave

Triangular wave

⇒ The frequency of domestic power supply in India is

200 Hz

100 Hz

60 Hz

50 Hz