Home
Class 12
PHYSICS
The coefficient of induction of a choke ...

The coefficient of induction of a choke coil is `0.1 H` and resistance is `12 Omega`. If it is connected to an alternating current source of frequency `60 Hz`, then power factor will be

A

`0.32`

B

`0.30`

C

`0.28`

D

`0.24`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT

    VMC MODULES ENGLISH|Exercise ENABLE|50 Videos
  • ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT

    VMC MODULES ENGLISH|Exercise EFFICIENT|49 Videos
  • ELECTROMAGNETIC INDUCTION & ALTERNATING CURRENT

    VMC MODULES ENGLISH|Exercise IN-CHAPTER EXERCISE-G|10 Videos
  • ELECTROSTATICS

    VMC MODULES ENGLISH|Exercise JEE Advanced (Archive)|89 Videos

Similar Questions

Explore conceptually related problems

A coil of inductance L = 5//8 H and of resistance R = 62.8 (Omega) is connected to the mains alternating voltage of frequency 50 Hz. What can be the capacitance of the capacitor (in (mu)F) connected in series with the coil if the power dissipated has to remain unchanged? Take (pi)^(2) = 10 .

What is the value of power factor for a pure resistor connected to an alternating current source?

A coil of 200Omega resistance and 1.0H inductance is conneted to an AC source of frequency 200//2pi Hz . Phase angle between potential and current will be

The inductance of a choke-cail is 0.2 henry and its resistance is 0.50 Omega . A current of 2.0 ampere (rms value) and frequency 50 Hz be passed through it, what will be the potential difference across its ends

A coil of inductance 8.4 mH and resistance 6 Omega is connected to a 12 V battery. The current in the coil is 1.0 A at approximately the time.

A coil of inductance L=5H and resistance R=55Omega is connected in series to the mains alternating voltage of frequency f=50Hz in series. What can be the non-zero capacitance of the capacitor (in muF ) connected in series with the coil, if the power dissipated has to remain unchanged. (take pi^(2)=10 )

A coil of inductance 8.4 mH and resistance 6 (Omega) is connected to a 12 V battery. The current in the coil is 1.0 A at approximately the time

A coil having self-inductance of 0.7 H and resistance of 165 Omega is connected to an a.c. source of 275 V, 50 Hz. If pi = 22/7 Calculate : Reactance of the coil

A coil having self-inductance of 0.7 H and resistance of 165 Omega is connected to an a.c. source of 275 V, 50 Hz. If pi = 22/7 Calculate : Impedance of the coil

A coil of inductance 300mh and resistance 2Omega is connected to a source of voltage 2V . The current reaches half of its steady state value in

VMC MODULES ENGLISH-ELECTROMAGNETIC INDUCTION & ALTERNATIVE CURRENT -IMPECCABLE
  1. The coefficient of induction of a choke coil is 0.1 H and resistance i...

    Text Solution

    |

  2. The turn ratio of a transformers is given as 2:3. If the current throu...

    Text Solution

    |

  3. A transformer with efficiency 80% works at 4 kW and 100 V. If the seco...

    Text Solution

    |

  4. In the induction coil, across secondary coil the output voltage is pra...

    Text Solution

    |

  5. The number o turns of primary and secondary coils of a transformer ar...

    Text Solution

    |

  6. If a transfomer of an audio amplifier has output impedance 8000Omega a...

    Text Solution

    |

  7. The coefficient of mutual inductance between the primary and secondar...

    Text Solution

    |

  8. Quantity that remains unchanged in a transformer is

    Text Solution

    |

  9. What is the peak value of the voltage of a 220V ac line?

    Text Solution

    |

  10. If reading of an ammeter is 10 A, the peak value of current is

    Text Solution

    |

  11. In an AC circuit, the impedance is sqrt3 times the reactance, then the...

    Text Solution

    |

  12. An alternating potential V = underset(o)(V) sin omegat is applied acro...

    Text Solution

    |

  13. An Ac voltage is represented by e=220 sin (100pi) t volt and is applie...

    Text Solution

    |

  14. If an AC produces same heat as that produced by a steady current of...

    Text Solution

    |

  15. The potential difference V and the current I flowing through an ins...

    Text Solution

    |

  16. An alternating current is given by I = i1 cos omegat + i2 sin omegat...

    Text Solution

    |

  17. Core of transformer is made up

    Text Solution

    |

  18. A transformer works on the principle of

    Text Solution

    |

  19. A transformer has an efficiency of 80%. It works at 4 kW and 100 V. If...

    Text Solution

    |

  20. In a step - down transformer, the number of turns in

    Text Solution

    |

  21. A step-up transformer operates on a 230 V line and supplies a current ...

    Text Solution

    |