Home
Class 12
PHYSICS
A coil of self-inductance L is connected...

A coil of self-inductance `L` is connected in series with a bulb `B` and an `AC` source. Brightness of the bulb decreases when

A

Frequency of the AC source is decreased

B

number of turns in the coil is reduced

C

a capcitance of reactance `X_(C)=X_(L)` is included in the same circuit

D

an iron rod is inserted in the cell

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ATOMIC PHYSICS

    NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)|Exercise Atomic Physics|39 Videos
NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-ALTERNATING CURRENT AND ELECTROMAGNETIC WAVES-All Questions
  1. The energy of the electromagetic wave is of the order of 15 keV. To wh...

    Text Solution

    |

  2. A transformer having efficiency of 90% is working on 200 V and 3 kW po...

    Text Solution

    |

  3. A coil of self-inductance L is connected in series with a bulb B and a...

    Text Solution

    |

  4. In an electrical circuit R,L,C and an AC voltage source are all connec...

    Text Solution

    |

  5. The electric field associted with an electromagnetic wave in vacuum is...

    Text Solution

    |

  6. The electric and the magnetic field, associated with a electromagnetic...

    Text Solution

    |

  7. In an ac circuit , an alternating voltage e = 200 sqrt2 sin 100 t volt...

    Text Solution

    |

  8. An AC voltage is applied to a resistance R and an inductance L in seri...

    Text Solution

    |

  9. The decreasing order of wavelength of infrared, microwave, ultraviolet...

    Text Solution

    |

  10. Which of the following statement is false for the properties of electr...

    Text Solution

    |

  11. In the given circuit, Fig., the reading of voltmeter V(1) and V(2) 300...

    Text Solution

    |

  12. A 220 V input is supplied to a transformer. The output circuit draws a...

    Text Solution

    |

  13. Power dissipated in an L-C-R series circuit connected to an AC source ...

    Text Solution

    |

  14. The electric field part of an electromagnetic wave in a medium is repr...

    Text Solution

    |

  15. In any AC circuit the emf (e) and the current (i) at any instant are g...

    Text Solution

    |

  16. The velocity of electromagnetic radiatior in a medium of permittivity ...

    Text Solution

    |

  17. A transformer is used to light a 100 W and 110 V lamp from a 220V main...

    Text Solution

    |

  18. The primary and secondary coils of a transmformer have 50 and 1500 tur...

    Text Solution

    |

  19. What is the value of inductance L for which the current is a maximum i...

    Text Solution

    |

  20. A coil of inductive reactance 31 Omega has a resistance of 8 ohm. It i...

    Text Solution

    |