Home
Class 12
PHYSICS
The peak power consumed by a resistive c...

The peak power consumed by a resistive coil when connected to an AC source is `80 W`. Find the energy consumed by the coil in 1000 seconds which is many times larger than the time period of the source.

Text Solution

Verified by Experts

Here `P_0 = 80 W`
`P_(rms) = P_0/2 = 40 W`
Energy consumed `=P xx t`
` 40 xx 100`
`=4000J = 4.0KJ`.
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    HC VERMA|Exercise Objective 2|7 Videos
  • BOHR'S MODEL AND PHYSICS OF THE ATOM

    HC VERMA|Exercise Exercises|46 Videos

Similar Questions

Explore conceptually related problems

A coil of inductance 1.0 H and resistance 100 Omega is connected to a battery of emf 12 V. Find the energy stored in the magnetic field associated with the coil at an instant 10 ms after the circuit is switched on.

A resistor of resistance 100 Omega is connected to an AC source epsilon = (12 V) sin (250 pi s^(-1))t . Find the energy dissipated as heat during t = 0 to t = 1.0 ms .

Two coils have a combined resistance of 9 Omega when connected in series and 2 Omega when connected in parallel. Find the resistance of each coil.

An inductor coil joined to a 6 V battery draws a steady current of 12 A . This coil is connected to a capacitor and an AC source of rms voltage 6 V in series. If the current in the circuit is in phase with the emf, find the rms current.

A coil having an inductance L and a resistance R is connected to a battery of emf epsilon . Find the time elapsed before (a) the current reaches half its maximum value, (b) the power dissipated in heat reaches half its maximum value and © the magnetic field energy stored in the circuit reaches half its maximum value.

A resistance of 20 Omega is connected to a source of alternating current rated 110 V, 50 Hz . Find (a) the rms current, (b) the maximum instantaneous current in the resistor and (c) the time taken by the current to change from its maximum value to the rms value.

A coil has a resistance of 10 Omega and an inductance of 0.4 henry. It is connected to an AC source of 6.5 V, 30/(pi) Hz . Find the average power consumed in the circuit.

An inductor-coil having some resistance is connected to an AC source. Which of the following quantities have zero average value over a cycle?

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

An electric iron has a resistance of 80 Omega and is connected to a source of 200 V. If it is used for two hours then Calculate the electrical energy spent.

HC VERMA-ALTERNATING CURRENT-Exercise
  1. Find the time required for a 50 Hz alternating current to change its v...

    Text Solution

    |

  2. The household suply of electricity is at 220 V (rms value) and 50 Hz. ...

    Text Solution

    |

  3. A bulb rated 60 W at 220 V is connected across a household supply of a...

    Text Solution

    |

  4. An electric bulb is designed to operate at 12 volts DC. If this bulb i...

    Text Solution

    |

  5. The peak power consumed by a resistive coil when connected to an AC so...

    Text Solution

    |

  6. The dielectric strength of air is 3.0 xx 10^6 V/m. A parallel-plate ai...

    Text Solution

    |

  7. The current in a discharging LR circuit is given by I = i0 (t/tau) whe...

    Text Solution

    |

  8. A capacitor of capacitance 10 muF is connected to an oscillator giving...

    Text Solution

    |

  9. A coil of inductance 5.0 mH and negligible resistance is connected to ...

    Text Solution

    |

  10. A coil has a resistance of 10 Omega and an inductance of 0.4 henry. It...

    Text Solution

    |

  11. A resistor of resistance 100 Omega is connected to an AC source epsilo...

    Text Solution

    |

  12. In a series RC circuit with an AC source, R = 300 Omega, C = 25 muF, e...

    Text Solution

    |

  13. An electric bulb is designed to consume 55 W when operated at 110 volt...

    Text Solution

    |

  14. In a series LCR circuit with an AC source, R = 300 Omega, C = 20 muF, ...

    Text Solution

    |

  15. Consider the situation of the previous problem. Find the average elect...

    Text Solution

    |

  16. An inductance of 2.0 H, a capacitance of 18 muF and a resistance of 10...

    Text Solution

    |

  17. An inductor- coil, a capacitor and an AC source of rms voltage 24 V ar...

    Text Solution

    |

  18. Figure shows a typical circuit for low-pass filter. An AC input Vi = 1...

    Text Solution

    |

  19. A transformer has 50 turns in the primary and 100 in the secondary. If...

    Text Solution

    |