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. | For the same peak value, which of the following wave has the least mean value ? |

A. | Half wave rectified sine wave [Correct Answer] |

B. | Triangular wave [Wrong Answer] |

C. | Sine wave [Wrong Answer] |

D. | Square wave [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 :**

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

Impedance

Susceptance

Quality factor

Selectivity

⇒ 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

⇒ The period of a wave is

The same as frequency

Time required to complete one cycle

Expressed in amperes

None of the above

⇒ 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 power taken by a 3-Φ load is given by the expression

√3 V

_{L}I

_{L}sinΦ

√3 V

_{L}I

_{L}cosΦ

3 V

_{L}I

_{L}sinΦ

3 V

_{L}I

_{L}cosΦ

⇒ 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

⇒ The shunt element in a band pass filter is

Capacitive

Inductive

Parallel combination of L and C

Series combination of L and C

⇒ The safest value of current the human body can carry for more than 3 second is

4 mA

9 mA

15 mA

25 mA

⇒ 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

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

Less than unity

Unity

Greater than Unity

Zero

⇒ 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 r.m.s. value and mean value is the same in the case of

Triangular wave

Sine wave

Square wave

Half wave rectified sine wave

⇒ 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

⇒ Higher the Q of a series circuit

Broader its resonance curve

Narrower its pass band

Greater its band width

Sharper its resonace

⇒ 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

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

Very low

Low

Medium

High

⇒ For a sine wave with peak value E

_{max}the average value is

0.636 E

_{max}

0.707 E

_{max}

0.434 E

_{max}

1.414 E

_{max}

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

Parallel

Series

Either (A) or (B)

None

⇒ Power factor of the following circuit will be unity

Inductance

Capacitance

Resistance

Both (A) and (B)

⇒ 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

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

Maximum

Minimum

Zero

Infinite

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

20 Hz

30 Hz

40 Hz

50 Hz

⇒ 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

⇒ 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

⇒ 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

⇒ The power factor at resonance in RLC parallel circuit is

Zero

0.08 Lagging

0.8 Leading

Unity

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

Cycle

Cycle-sec

Hertz

Hertz/sec

⇒ The dual of a loop is

Twig

Node pair

Mesh

Tree