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A \(100~\Omega\) resistor is connected to a \(220~\text{V}\), \(50~\text{Hz}\) \(\text{AC}\) supply. The net power consumed over a full cycle is:

1. | \(484~\text{W}\) | 2. | \(848~\text{W}\) |

3. | \(400~\text{W}\) | 4. | \(786~\text{W}\) |

Subtopic: Power factor |

86%

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The RMS value of current in an AC circuit is \(10 ~\text A.\) The peak current in the circuit is:

1. \(1.41 ~\text A\)

2. \(14.1 ~\text A\)

3. \(7.07~\text A\)

4. \(0.707 ~\text A\)

Subtopic: RMS & Average Values |

84%

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A \(44\) mH inductor is connected to a \(220\) V, \(50\) Hz AC supply. The RMS value of the current in the circuit is:

1. | \(1.0~\text{A}\) | 2. | \(15~\text{A}\) |

3. | \(15.92~\text{A}\) | 4. | \(14.29~\text{A}\) |

Subtopic: Different Types of AC Circuits |

80%

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Calculate the \(Q\text-\)value of a series \(LCR\) circuit with \(L= 2.0~\text{H}, C = 32~\mu\text{F}\) and \(R = 10~\Omega\).

1. \(35\)

2. \(20\)

3. \(15\)

4. \(25\)

1. \(35\)

2. \(20\)

3. \(15\)

4. \(25\)

Subtopic: Different Types of AC Circuits |

81%

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A 60 µF capacitor is connected to a 110 V, 60 Hz ac supply. The RMS value of the current in the circuit is:

1. 2.49 A

2. 2.12 A

3. 1.97 A

4. 1.24 A

Subtopic: Different Types of AC Circuits |

73%

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A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 µF is connected to a variable-frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

1.2200 W

2.2000 W

3.2020 W

4. 2120 W

Subtopic: Different Types of AC Circuits |

75%

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A radio can tune over the frequency range of a portion of the MW broadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 µH, what must be the range of its variable capacitor?

1. 87.8 pF−197.7 pF

2. 88.3 pF−198.8 pF

3. 89.3 pF−199.1 pF

4. 89.1 pF−196.9 pF

Subtopic: Different Types of AC Circuits |

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Figure shows a series \(LCR\) circuit connected to a variable frequency \(230\) V source. \(L = 5.0~\text{H},\) \(C= 80~\mu\text{F},\) \(R= 40~\Omega\)

The amplitude of current at the resonating frequency is:

1. \(8.13\) A

2. \(3.82\) A

3. \(4.44\) A

4. \(1.41\) A

Subtopic: Different Types of AC Circuits |

60%

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Figure shows a series LCR circuit connected to a variable frequency 230 V source. L = 5.0 H, C = 80uF, R = 40 $\Omega $

The RMS potential drop across the resistor under the resonating condition is:

1. 200 V

2. 220 V

3. 230 V

4. 0

Subtopic: Different Types of AC Circuits |

69%

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A coil of inductance 0.50 H and resistance 100 $\Omega $ is connected to a 240 V, 50 Hz ac supply. What is the maximum current in the coil?

1. 1.29 A

2. 1.82 A

3. 2.29 A

4. 2.82 A

Subtopic: Different Types of AC Circuits |

53%

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