Home
Class 12
PHYSICS
When an alternating emf, e=300 sin 100pi...

When an alternating emf, e=300 sin `100pit` volt is applied across a bulb, the peak value of current is found to be 2 A. the average power is

A

100 W

B

200 W

C

300 W

D

400 W

Text Solution

Verified by Experts

The correct Answer is:
C
`overline(P)=(e_(0)I_(0))/(2)`
`=(300xx2)/(2)=300W`
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

An alternating emf, e=300 sin100 pit volt, is applied to a pure resistance of 100 Omega . The rms current through the circuit is

In ac circuit contains a pure capacitor, across which an ac emf e = 100 sin (1000t) , volt is applied. If the peak value of the current is 200 mA, then the value of the capacitor is

The alternating emf of e=e_(0) sin omegat is applied across capacitor C. the current through the circuit is given by

The alternating emf of e=e_(0) sin omegat is applied across LR series circuit. The impedance and phase angle between current and voltage is

An a.c. emf of e=220 sin omega t is applied across the capacitor, the power consumption is

When the voltage applied across a bulb is 200 V, the current passing through the bulb is 0.1 A. Find the power of the bulb .

An e.m.f. E = 200 sin 377 t volt is applied across an inductance L having a resistance of 1.0 ohm. The maximum current is found to be 10 A. Find the value of L.

An alternating voltage v(t) = 220 sin 100 pt volt is applied to a purely resistive load of 50Omega . The time taken for the current to rise from half of the peak value to the peak value is :

The equation of an alternating current is I=20sin300pit .Calculate the frequency and r.m.s value of current

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. A coil of 1000 turns each of area 1.2m^(2) is rotating about an axis i...

    Text Solution

    |

  2. An alternating emf, e=200 sin omegat is applied to a lamp, whose filam...

    Text Solution

    |

  3. When an alternating emf, e=300 sin 100pit volt is applied across a bul...

    Text Solution

    |

  4. An alternating emf of peak value 350 V is applied across an a.c. ammet...

    Text Solution

    |

  5. A circular coil of 50 turns an diameter 24 cm is rotated continuously ...

    Text Solution

    |

  6. The self inductance of a circuit ini which an emf of 10 V is induced w...

    Text Solution

    |

  7. The mutual inductance of a pair of a coil is 0.75 H. if the current in...

    Text Solution

    |

  8. The reactance of 2 H inductance in an ac circuit of frequency 50 Hz is

    Text Solution

    |

  9. The reactance of 1muF condenser in an ac circuit of frequency 50 Hz is...

    Text Solution

    |

  10. A coil has an inductance of 0.5 H is connected in series with a resist...

    Text Solution

    |

  11. A capacitor of capacitance 20muF is connected in series with 25Omega r...

    Text Solution

    |

  12. The frequency of voltage source used in ac circuit is 5 kHz. The circu...

    Text Solution

    |

  13. The power factor of a circuit containing a lamp of resistance 100 Omeg...

    Text Solution

    |

  14. A capacitor of capacitance 2 muF and resistance of 100 Omega are conne...

    Text Solution

    |

  15. An alternating emf of 200 V, 50 Hz is applied a circuit containing a r...

    Text Solution

    |

  16. An AC circuit consists of a resistor of 5Omega and inductor of 10 mH c...

    Text Solution

    |

  17. A 50Omega resistor is connected in series with an inductance of 450 mH...

    Text Solution

    |

  18. In inductance of (4//pi) H and the resistor R, are connected in series...

    Text Solution

    |

  19. In a circuit shown in figure. What will be the readings of a voltmeter...

    Text Solution

    |

  20. An inductor L and a capacitor C are connected in the circuit as shown ...

    Text Solution

    |