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Q1. | The r.m.s. value and mean value is the same in the case of |

A. | Triangular wave [Wrong Answer] |

B. | Sine wave [Wrong Answer] |

C. | Square wave [Correct Answer] |

D. | Half wave rectified sine wave [Wrong Answer] |

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

⇒ 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 dual of a loop is

Twig

Node pair

Mesh

Tree

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

Resistance only

Inductance only

Capacitance only

None of the above

⇒ In a purely inductive circuit

Actual power is zero

Reactive power is zero

Apparent power is zero

None of these

⇒ 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

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

Minimum

Maximum

Zero

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

⇒ The frequency of domestic power supply in India is

200 Hz

100 Hz

60 Hz

50 Hz

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

Demand

Load

Power

Form

⇒ 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 value of operator j2 is equal to

Zero

+1

-1

√-1

⇒ 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

⇒ What inductance will give the same reactance as a capacitor of 2 µF when both are at 50 Hz?

5 H

10 H

15 H

20 H

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

Cycle

Cycle-sec

Hertz

Hertz/sec

⇒ The dual of a link is

Twig

Node

Loop

Tree branch

⇒ The time constant of a series R-C circuit is given by

R/C

RC

^{2}

RC

R

^{2}C

⇒ 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 peak value of a sine wave is 200 V. Its average value is

127.4V

141.4V

282.8V

200 V

⇒ Power factor of the following circuit will be unity

Inductance

Capacitance

Resistance

Both (A) and (B)

⇒ 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}

⇒ 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

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

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⇒ 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

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

C only

L only

R only

All of the above

⇒ Ohm is the unit of all of the following except

Inductive reactance

Capacitive reactance

Resistance

Capacitance

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

4 mA

9 mA

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25 mA

⇒ Capacitors for power factor correction are rated in

kW

kVA

kV

kVAR

⇒ The shunt element in a band pass filter is

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Series combination of L and C

⇒ Power factor of electric bulb is

Zero

Lagging

Leading

Unity

⇒ Capacitive reactance is more when

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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