Home
Class 12
PHYSICS
For an AC circuit V=15sin omegat and I=2...

For an `AC` circuit `V=15sin omegat` and `I=20cos omegat` the average power consumed in this circuit is

A

`300` watt

B

`150` watt

C

`75` watt

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D

`P=V_(rms)I_(rms)=cos varphi`, since `varphi=90^(@)` So, `P=0`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    A2Z|Exercise Problems Based On Mixed Concepts|40 Videos
  • ALTERNATING CURRENT

    A2Z|Exercise Section B - Assertion Reasoning|26 Videos
  • ALTERNATING CURRENT

    A2Z|Exercise Different Ac Circuits|30 Videos
  • ATOMIC PHYSICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

For an ac circuit V=15 sin omega t and I=20 cos omega t the average power consumed in this circuit is

When a voltage v_(s)=200sqrt2 sin (omega t=15^(@)) is applied to an AC circuit the current in the circuit is found to be i=2som (omegat+pi//4) then average power consumed in the circuit is

In the given A.C. circuit the average power consumed in the circuit is

In the given A.C. circuit the average power consumed in the circuit is

When a voltage v_(S)=200sqrt2 sin (omega t+15^(@)) is applied to an AC circuit the current in the circuit is found to be i=2 sin (omegat+pi//4) then average power concumed in the circuit is (A) 200 watt , (B) 400sqrt2 watt , (C ) 100sqrt6 watt , (D) 200sqrt2 watt

The e.m.f. and the current of an A.C. circuit are e=5cos omega t volt and I=2sin omega t ampere respectively. The power consumed in the circuit is

Voltage input in a circuit is V = 300 sin (omega t) with current = 100 cos(omega t) . Average power loss in the circuit is

In an LR -circuit, the inductive reactance is equal to the resistance R of the circuit. An e.m.f E=E_(0)cos (omegat) applied to the circuit. The power consumed in the circuit is

When a voltage V_(s)=200 sqrt(2) sin (100 t) V is applied to an ac circuit the current in the circuit is found to be i=2 sin [omega t + (pi//4)]A . Find the average power consumed in the circuit.

A2Z-ALTERNATING CURRENT-Power In Ac Circuits
  1. Current in the circuit is wattless, if

    Text Solution

    |

  2. In an AC circuit, V and I are given by V=100sin(100t)"volts", I=100sin...

    Text Solution

    |

  3. A sinusoidal alternating current of peak value (I0) passes through a h...

    Text Solution

    |

  4. In an a.c. Circuit the voltage applied is E=E(0) sin (omega)t. The res...

    Text Solution

    |

  5. In an AC circuit, the instantaneous values of e.m.f and current are e...

    Text Solution

    |

  6. In an AC circuit, the current is given by i=5sin(100t-(pi)/2) and the ...

    Text Solution

    |

  7. What is the r.m.s. value of an alternating current which when passed t...

    Text Solution

    |

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

    Text Solution

    |

  9. For an AC circuit V=15sin omegat and I=20cos omegat the average power ...

    Text Solution

    |

  10. An alternating e.m.f. of angular frequency omega is applied across an ...

    Text Solution

    |

  11. The power factor of a good choke coil is

    Text Solution

    |

  12. For wattless power is an AC circuit, the phase angle between the curre...

    Text Solution

    |

  13. The r.m.s current in an AC circuit is 2A. If the wattless current be s...

    Text Solution

    |

  14. In an LR-circuit, the inductive reactance is equal to the resistance R...

    Text Solution

    |

  15. An L-C-R series circuit with 100Omega resistance is connected to an AC...

    Text Solution

    |

  16. An rms voltage of 110 V is applied across a series circuit having a re...

    Text Solution

    |

  17. 2.5/(pi) muF capacitor and 3000-ohm resistance are joined in series t...

    Text Solution

    |

  18. The self-inductance of a choke coil is 10mH. When it is connected with...

    Text Solution

    |

  19. A group of electric lamps having a total power rating of 1000 watt is ...

    Text Solution

    |

  20. In the circuit of fig, the source frequency is omega=2000 rad s^(-1). ...

    Text Solution

    |