Home
Class 12
PHYSICS
Suppose the frequency of the source in t...

Suppose the frequency of the source in the above example can be varied (a) What is the frequency of the source at which resonance occurs ? (b) Calculate the impedeance, the current and power dissipated at the resonant condition.

Text Solution

Verified by Experts

The correct Answer is:
`35.38 Hz , 66.71 A m 3 Omega` 13.35 kW
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise CONCEPTUAL QUESTIONS|25 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise TOUGH & TRICKY PROBLEMS|12 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise CHAPTER PRACTICE TEST|16 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

If the frequency of the source e.m.f. in an AC circuit in n ,the power varies with a frequency:

If the frequency of the source e.m.f. in an AC circuit is n, the power varies with a frequency:

In a series LCR circuit, the frequency of the source is more than resonance frequency. The current in the circuit leads the voltage in phases(True/false).

Figure here, shows a series L-C-R circuit connected to a variable frequency 230 V source. L = 5.0H, C = 80 muF and r = 40 Omega (a) Determine the source frequency which drives the circuit in resonance. (b) Obtain the impedance of the circuit and the amplitude of current at the resonating frequency. (c) Determine the rms potential drops across the three elements of the circuit. show that the potential drop across the L-C combination is zero at the resonating frequency.

In a series R-L-C circuit, the frequency of the source is half of the resonance frequency. The nature of the circuit will be

(a) What do you understand by 'sharpness of resonance' for a series LCR resonant circuit? How is it related with the quality factor 'Q' of the circuit? Using the graphs given in the diagram, explain the factors which affect it. For which graph is the resistance (R ) minimum? (b) A 2 muF capacitor, 100 Omega resistor and 8 H inductor are connected in serieswith an ac source. Find the frequency of the ac source for which the current drawn in the circuit is maximum. If the peak value of emf of the source is 200 V, calculate the (i) maximum current, and (ii) inductive and capacitive reactance of the circuit at resonance.

A series LCR circuit with L = 4.0 h, C = 100 mu F and R = 60 Omega is connected to a varialbe frequency 240 V source. Calcalate (i) angular frequency of the source which drives the circuit in resonace, (ii) current at the resonating frequency, (iii) rms potential drop across the inductro at resonance.

A series LCR circuit connected to a variable frequency 230 V source has L = 5.0 H, C = 80 mu F , R = 40 Omega , Fig. (a) Determine the source frequency which drives the circuit in resonance. (b) Obtain the impedance of the circuit and amplitude of current at at resonating frequency. (c ) Determine the r.m.s. potential drops acorss the three elements the circuits. Show that the potential drop acorss the LC combination is zero at the resonating frequecny.

When the frequency of the AC source in an LCR circuit equals the resonant frequency, the reactance of the circuit is zero. Does it mean that there is no current through the inductor or the capacitor?

MODERN PUBLICATION-ALTERNATING CURRENT -PRACTICE PROBLEMS
  1. A capacitor and resistor of 12Omega are connected in series with an AC...

    Text Solution

    |

  2. A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applie...

    Text Solution

    |

  3. Suppose the frequency of the source in the above example can be varied...

    Text Solution

    |

  4. Calculate the capacitance of a capacitro connected across an alternati...

    Text Solution

    |

  5. A series LCR circuit is connected top an AC power source of 220 V , 50...

    Text Solution

    |

  6. A 200Omega resistor is connected to a 220 V, 50 Hz AC supply. Calculat...

    Text Solution

    |

  7. A series LCR circuit is connected across an AC power supply of 220 V. ...

    Text Solution

    |

  8. A resistor of 80 Omega in a current element X is connected across an A...

    Text Solution

    |

  9. A 80 Omega resistor a 2 H inductor and a 5.07xx10^(-6) F capacitor are...

    Text Solution

    |

  10. In a series LCR circuit with value of R = 15 Omega , L = 5 H , C = 100...

    Text Solution

    |

  11. A series LCR circuit with L = 4.0 H, C = 100 mu F and R = 60 Omega is ...

    Text Solution

    |

  12. In a series LCR circuit with variable inductor 80 nF capacitor and 70 ...

    Text Solution

    |

  13. A 5 H inductor 80 Omega resistor and 3muF capacitor are connected in...

    Text Solution

    |

  14. A 2 mu F capacitor, 100 ohm resistor and 8 H inductor are connected in...

    Text Solution

    |

  15. A 70 Omega resistor is connected in series to a capacitor and an induc...

    Text Solution

    |

  16. An inductor of 0.2 H is connected to a 5 V battery. The current flowin...

    Text Solution

    |

  17. A 0.05 H inductor is connected to a fully charged 80 muF capacitor. Th...

    Text Solution

    |

  18. A capacitor is connected to a 2 mH inductor in series with an AC sourc...

    Text Solution

    |

  19. A 0.2 H inductor is connected across an AC power supply . The current ...

    Text Solution

    |

  20. A 6 mu F capacitor is connected to an AC source of frequency 100 Hz ....

    Text Solution

    |