Home
Class 12
PHYSICS
In an L-R circuit, the inductive reactan...

In an L-R circuit, the inductive reactance is equal to the resistance R of the circuit. An emf `E = E_(0) cos(omegat)` is applied to the circuit. The power consumed in the circuit is :

A

`(E_(0)^(2))/(sqrt(2)R)`

B

`(E_(0)^(2))/(4R)`

C

`(E_(0)^(2))/(2R)`

D

`(E_(0)^(2))/(8R)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    AAKASH SERIES|Exercise EXERCISE - II|26 Videos

  • APPENDICES ( REVISION EXERCISE )

    AAKASH SERIES|Exercise REVISION EXERCISE (MOVING CHANGES & MEGNETISM)|95 Videos

Similar Questions

Explore conceptually related problems

In the given circuit current I is independent of the resistance R_(6) . Then

An AC circuit contains a resistance R, an inductance L and a capacitance C connected in series across an alternator of constant voltage and variable frequency. At resonant frequency, it is found that the inductive reactance, the capacitive reactance and the resistance are equal and the current in the circuit is i_(0) . Find the current in the circuit at a frequency twice that of the resonant frequency.

A DC source with internal resistance R_(0) is connected to three identical resistors each of resistance R as shown in the figure. If the thermal power generated in the circuit is highest, then

An initially charged undriven LCR circuit having inductance L, capacitance C and resistance R will be

AAKASH SERIES-ALTERNATING CURRENT-EXERCISE - III
  1. When 100V DC is applied across a solenoid, a current of 1A flows in it...

    Text Solution

    |

  2. If a circuit made up of a resistance 1 and inductance 0.01H, and alter...

    Text Solution

    |

  3. In an L-R circuit, the inductive reactance is equal to the resistance ...

    Text Solution

    |

  4. An alternating voltage E = 200sqrt(2)sin(100t)V is connected to a 1muF...

    Text Solution

    |

  5. At a frequency omega(0) the reactance of a certain capacitor equals th...

    Text Solution

    |

  6. What is the resistance to be connected in series with a condenser of a...

    Text Solution

    |

  7. An LCR series circuit consists of a resistance of 10omega, a capacitor...

    Text Solution

    |

  8. An L-C-R series circuit with 100 2 resistance is connected to an A.C s...

    Text Solution

    |

  9. An A.C. circuit contains a resistor 'R', an inductor 'L' and a capacit...

    Text Solution

    |

  10. When an ac source of emf E = E(0) Sin (100pit) is connected across a c...

    Text Solution

    |

  11. An electric lamp designed for operation on 110 V AC is connected to a2...

    Text Solution

    |

  12. In a series LCR circuit the frequency of a 10V, AC voltage source is a...

    Text Solution

    |

  13. A circuit containing resistance R(1), inductance L(1) and capacitance ...

    Text Solution

    |

  14. An LCR circuit has 1= 10mH, R = 3Omega" and "C = 1muF connected in ser...

    Text Solution

    |

  15. In a series L-C-R circuit connected to an AC source operating at angul...

    Text Solution

    |

  16. The power in AC circuit is given by P = E("rms")I("rms") cos phi. The ...

    Text Solution

    |

  17. A circuit draws 330W from a 110V, 60Hz AC line. The power factor is 0....

    Text Solution

    |

  18. The power factor of the circuit is 1//sqrt(2). The capacitance of the ...

    Text Solution

    |

  19. The natural frequency of an LC - circuit is 125KHz. Then the capacitor...

    Text Solution

    |

  20. The tuning circuit of a radio receiver has a resistance of 50Omega, an...

    Text Solution

    |