Home
Class 12
PHYSICS
In an AC circuit with voltage V and curr...

In an `AC` circuit with voltage `V` and current `I`, the power dissipated is

A

`VI//2`

B

`VI//sqrt(2)`

C

`VI`

D

depends on phase voltage V and current I

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    NIKITA PUBLICATION|Exercise MCQ|314 Videos
  • ELECTRONS AND PHOTONS

    NIKITA PUBLICATION|Exercise MCQs|162 Videos

Similar Questions

Explore conceptually related problems

A 60 Hz AC voltage of 160 V impressed across an LR-circuit results in a current of 2A. If the power dissipation is 200 W, calculate the maximum value of the back emf (in volt) arising in the inductance.

What is the power dissipation in an AC circuit in which voltage and current are given by V = 300 sin (omegat +(pi)/(2)) and I = 5 sin omegat ?

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The total power abosrbed per cycle by all the three circuit elements is

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The average power transferred per cycle t inductors is

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power//cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz This average power transferred per cycle to resistance is

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The average power transferred per cycle ot capacitor is

In an a.c circuit, value of voltage and current change every instant. Therefore, power of an a.c. circuit at any instant is the product of instantaneous voltages (E) and instantaneous current (I) . The average power supplied to a pure resistance R over a complete cycle of a.c is P = E_(upsilon). I_(upsilon) . When circuit is inductive, average power/cycle = E_(upsilon) I_(upsilon) cos phi , where phi is the phase angle between alternating voltage an altenating current in the circuit. In an a.c. circuit, 800 mH inductor and a 60 mu F capacitor are connected in series with 15 ohm resistance. The a.c. supply to the circuit is 230 V, 50 Hz The electrial energy spent in running the circuit for one hour is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. An a.c. emf of e=220 sin omega t is applied across the capacitor, the ...

    Text Solution

    |

  2. An a.c. emf of e=220 sin 100pit is passed through the resistance of 1 ...

    Text Solution

    |

  3. In an AC circuit with voltage V and current I, the power dissipated is

    Text Solution

    |

  4. The reactance of capacitor at 50Hz is 10Omega. What will be its reacta...

    Text Solution

    |

  5. Power factor of the AC circuit varies between

    Text Solution

    |

  6. The capacitive reactance of a capacitor is d.c. circuit in ohm is

    Text Solution

    |

  7. The graph between inductive reactance and frequency is

    Text Solution

    |

  8. The alternating emf of e=e(0) sin omegat is applied across LR series c...

    Text Solution

    |

  9. The alternating emf of e=e(0) sin omegat is applied across capacitor C...

    Text Solution

    |

  10. The current leads the voltage by an angle phi which is given by

    Text Solution

    |

  11. The power dissipated in alternating circuit with voltage e=e(0) sin om...

    Text Solution

    |

  12. The powerr factor in CR circuit is given by

    Text Solution

    |

  13. For minimum dissipation energy in the circuit, the power factor should...

    Text Solution

    |

  14. Two electric appliances of power rating W(1) and W(2) at 220 V are con...

    Text Solution

    |

  15. Two electric appliances of power rating W(1) and W(2) t 240 V are conn...

    Text Solution

    |

  16. The rms value of alternating current which when passed through a resis...

    Text Solution

    |

  17. The applied emf lags behind the current by an angle of 45^(@) in the c...

    Text Solution

    |

  18. The values of current and voltage in an AC circuits are respectively I...

    Text Solution

    |

  19. Pure inductors each of inductance 3 H are connected as shown in figure...

    Text Solution

    |

  20. Which one of the follwing represents the variation of capacitive react...

    Text Solution

    |