Home
Class 12
PHYSICS
What is the power dissipation in an AC c...

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` ?

Text Solution

Verified by Experts

`P = V_(rms)(I_(rms) cos delta`
`delta = pi`/2
`rArr " " p = 0`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises (Long Answer Questions )|10 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises (Nuumerical problems )|18 Videos

  • ALTERNATING CURRENT

    MODERN PUBLICATION|Exercise Revision Exercises (Fill in the Blanks )|10 Videos

  • ATOMS

    MODERN PUBLICATION|Exercise Chapter Practice Test|16 Videos

Similar Questions

Explore conceptually related problems

What is power dissipation in an a.c. circuit in which E = 230 sin (omega t + pi//2) , I = 10 sin omega t ?

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

The power dissipated in alternating circuit with voltage e=e_(0) sin omegat and current I=I_(0)sin(omegat-phi) is

Voltage and current in an ac circuit are given by V=5 sin (100 pi t-pi/6) and I=4 sin (100 pi t+pi/6)

For an AC circuit the potential difference and current are given by V = 10 sqrt(2) sin omegat (in V) and i = 2 sqrt(2) cos omegat (in A) respectively. The power dissipated in the instrument is

Voltage and current is an AC circuit are given by V=sin(100pit-(pi)/6) and I=4sin(100pit+(pi)/6)

The voltage and current in an a.c. circuit are given by E = 300 sin (omega t + pi//2) and I = 5 sin omega t . What is power factor of the circuit and power dissipated in each cycle ?

An alternating current is given by I = i_1 cos omegat + i_2 sin omegat . The rms current is given by

MODERN PUBLICATION-ALTERNATING CURRENT -Revision Exercises Short Answer Questions
  1. (a) For a given a.c., i = i(m) sin wt, show that the average power dis...

    Text Solution

    |

  2. (a) In a series LCR circuit connected across an AC source of varible f...

    Text Solution

    |

  3. What is electric resonance ?

    Text Solution

    |

  4. Write down the condition of resonance in series L-C-R circuit and henc...

    Text Solution

    |

  5. An inductor L of inductance X(L) is connected in series with a bulb B ...

    Text Solution

    |

  6. Answer the following questions : (a) In any a.c. circuit, is the app...

    Text Solution

    |

  7. What is the power dissipation in an AC circuit in which voltage and cu...

    Text Solution

    |

  8. Obtain anexpression for the average power of an a.c circuit .

    Text Solution

    |

  9. What is wattless current ?

    Text Solution

    |

  10. What is power factor of an LCR circuit ? Explain on the basis of power...

    Text Solution

    |

  11. Given below are two electric circuits A and B. Calculate the rat...

    Text Solution

    |

  12. Describe the principle and theory of a transformer . Why the efficienc...

    Text Solution

    |

  13. With the help of a labelled diagram explain the working of a transform...

    Text Solution

    |

  14. Electrical energy is transmitted over large distances at high alternat...

    Text Solution

    |

  15. Why cannot a transformer be used to step up d.c. voltage ?

    Text Solution

    |

  16. The core of a transformer is made of magnetic material of high permean...

    Text Solution

    |

  17. State the principle of an ac generator.

    Text Solution

    |

  18. An a.c. generator having a constant magnetic field is conneted to a re...

    Text Solution

    |

  19. Can a.c. source be connected to a circuit and yet deliver no power to ...

    Text Solution

    |

  20. At resonance in an LCR circuit the emf and current are (i) in phase ...

    Text Solution

    |