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Q1. | The voltage of domestic supply is 220 V. This figure represents- |

A. | Mean value [Wrong Answer] |

B. | r.m.s. value [Correct Answer] |

C. | Peak value [Wrong Answer] |

D. | Average value [Wrong Answer] |

View Answer
Explanation:-
Answer : BDiscuss it below :Divya Shinde Said on 2019-02-15 01:26:15How to solve it !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

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

Voltage

VA

kW

kVAR

⇒ 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}

⇒ Two waves of the same frequency have opposite phase when the phase angle between them is

360°

180°

90°

0°

⇒ 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

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

Zero

0.5

Unity

Infinite

⇒ In a R-L-C series circuit if voltage V across the circuit is reduced to half the current I will change to

2 I

I/2

3/4 I

5/8 I

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

Half wave rectified sine wave

Triangular wave

Sine wave

Square wave

⇒ Form factor for a sine wave is

1.414

0.707

1.11

0.637

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

Homogeneity condition

Superposition condition

Both (A) and (B)

Associative condition

⇒ In a circuit containing R, L and C, power loss can take place

C only

L only

R only

All 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

⇒ 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

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

Square wave

Sine wave

Half wave rectifier sine wave

Triangular wave

⇒ 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 an A.C. circuit power is dissipated in

Resistance only

Inductance only

Capacitance only

None of the above

⇒ The period of a wave is

The same as frequency

Time required to complete one cycle

Expressed in amperes

None of the above

⇒ Which of the following is not a non-linear element ?

Transistor

Heater coil

Diode

Electric arc with unlike electrodes

⇒ 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

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

Low

Very low

High

Very high

⇒ The series element of a band stop filter is

Capacitive

Inductive

Parallel combination of L and C

Series combination of L and C

⇒ The form factor is the ratio of

Peak value to r.m.s. value

r.m.s. value to average value

Average value to r.m.s. value

None of these

⇒ Inductance affects the direct current flow

Only at the time of turning off

Only at the time of turning on

At the time of turning on and off

At all the time of operation

⇒ The frequency of domestic power supply in India is

200 Hz

100 Hz

60 Hz

50 Hz

⇒ 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

⇒ 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 negative maximum of a cosine wave occurs at

30

45

90

180

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

Parallel

Series

Either (A) or (B)

None

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

Inductance

Capacitance

Conductance

Resistance

⇒ 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

⇒ 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