## Alternating Current Circuit

This page consists of solved comprehensive questions of Alternating Current Circuit in cluded in the Physics course for Second Year students.

Question 1 | Explain with diagram sinusoidal alternating voltage and sinusoidal alternating current. See Answer |

Question 2 | Define mean, peak and rms values of sinusoidal voltage and sinusoidal current. Obtain mathematical expression for the rms value of current. See Answer |

Question 3 | A sinusoidal alternating voltage of angular frequency ω is connected across a resistor R. Find mathematical expressions for instantaneous voltage, instantaneous current and average power dissipated per cycle of the applied voltage. See Answer |

Question 4 | A sinusoidal alternating voltage of angular velocity ω is connected across a capacitor C. Find the mathematical expressions for instantaneous voltage, instantaneous current and the average power dissipated per cycle of the applied voltage. See Answer |

Question 5 | A sinusoidal voltage of angular frequency ω is connected across an inductance L. Find mathematical expressions for instantaneous voltage, instantaneous current and power dissipated per cycle. See Answer |

Question 6 | Explain the term impedance of an AC circuit. Find expression for the impedance of an RLC series circuit. See Answer |

Question 7 | Discuss maximum power is transferred when the impedance of load and source match to each other. See Answer |

Question 8 | In RL series circuit, will the current lag or lead the applied alternating voltage? Explain the answer with a phasor diagram. See Answer |

Question 9 | In an RC series circuit, will the current lag or lead the applied alternating voltage? Explain the answer with a phosor diagram. See Answer |

Question 10 | What do you mean by phasor diagram? Why we use it for sinusoidal current and voltage? |

Question 11 | Explain the resonance of a series RLC circuit. Show that resonance occurs at a frequency determined by fr. See Answer |

Question 12 | Describe the statement of four Maxwell’s equation.Use Maxwell theory to show that. See Answer |

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