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Q1. | The frequency of domestic power supply in India is |

A. | 200 Hz [Wrong Answer] |

B. | 100 Hz [Wrong Answer] |

C. | 60 Hz [Wrong Answer] |

D. | 50 Hz [Correct Answer] |

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

⇒ The period of a wave is

The same as frequency

Time required to complete one cycle

Expressed in amperes

None of the above

⇒ 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 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 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

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

Parallel

Series

Either (A) or (B)

None

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

R/C

RC

^{2}

RC

R

^{2}C

⇒ Selectivities of different resonance circuits are compared in terms of their

Impedances

Reactances

Frequencies

Band widths

⇒ 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

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⇒ 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 capacitors for power factor correction are rated in terms of

Voltage

VA

kW

kVAR

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

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0.707 of peak value

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⇒ 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

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

Inductance

Capacitance

Conductance

Resistance

⇒ 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

⇒ For the same peak value of voltage which wave form will have the least r.m.s. value ?

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Square wave

Triangular wave

Full wave rectified sine wave

⇒ Two sinusoidal quantities are said to be phase quadrature, when their phase difference is

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45°

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⇒ The value of operator j2 is equal to

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Remains in phase with

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⇒ In A.C. circuit the power curve is a sine wave having

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

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Superposition condition

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⇒ In a purely inductive circuit

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Reactive power is zero

Apparent power is zero

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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

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

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Low resistance

⇒ While drawing vector diagram for a series circuit the reference vector is

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90°

60°

0°