Home
Class 12
PHYSICS
A 100% efficient transformer has 100 tur...

A `100%` efficient transformer has `100` turns in the primary and `25` turns in its secondary coil. Of the current in the secondary coil is `4` amp, then the current in the primary coil is

A

1 amp

B

4 amp

C

8 amp

D

16 amp

Text Solution

Verified by Experts

The correct Answer is:
A

`I_(P)=(n_(S))/(n_(P))xxI_(S)=(25xx4)/(100)=1A`
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

A transformer has 1500 turns in the primary coil and 1125 turns in the secondary coil. If a voltage of 200V is applied across the primary coil , then the voltage in the secondary coil is :

A transformer consisiting of 300 turns in the primary and 150 turns in the secondary gives output power of 2.2 kw. If the current in the secondary coil is 10 A, then the input voltage and current in the primary coil are:

In a transformer, number of turns in the primary coil are 140 and that in the secondry coil are 280. If current i primary coil is 4A, then that in the secondary coil is

A transformer has 500 turns in the primary and 1000 turns in its secondary. The primary voltage is 200 V and load in secondary is 100 ohm. Calculate the current in primary assuming it to ideal transformer.

A transformer has turn ration 100//1 . If secondary coil has 4amp current then current in primary coil is

NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
  1. The alternating voltage induced in the secondary coil of a transformer...

    Text Solution

    |

  2. We can reduce eddy currents in the core of transformer

    Text Solution

    |

  3. A 100% efficient transformer has 100 turns in the primary and 25 turns...

    Text Solution

    |

  4. The efficiency of transfomer is very high because

    Text Solution

    |

  5. In a lossless transformer an alternating current of 2 amp is flowing i...

    Text Solution

    |

  6. A transformer connected to 220 volt line shows an output of 2A at 1100...

    Text Solution

    |

  7. A power transformer is used to step up an alternating e.m.f. of 220 V ...

    Text Solution

    |

  8. A step up transformer connected to a 220V AC line is to supply 22 kV f...

    Text Solution

    |

  9. A transformer is employed to

    Text Solution

    |

  10. The number of turns in the primary coil of a transformer is 200 and th...

    Text Solution

    |

  11. A step-up transformer has transformation ratio of 3:2 what is the volt...

    Text Solution

    |

  12. A step-down transformer is connected to main supply 200V to operate a ...

    Text Solution

    |

  13. Voltage in the secondary coil of a transfomer does not depend upon

    Text Solution

    |

  14. Large transformers, when used for some time, become hot and are cooled...

    Text Solution

    |

  15. In a step-up transformer the voltage in the primary is 220 V and the c...

    Text Solution

    |

  16. A transformer has 100 turns in the primary coil and carries 8A current...

    Text Solution

    |

  17. In a primary coil 5A current is flowing on 220 volts. In the secondary...

    Text Solution

    |

  18. The output voltage of a transformer connected to 220 voltl line is 110...

    Text Solution

    |

  19. Quantity that remains unchanged in a transformer is

    Text Solution

    |

  20. In a transformer, the number of turns in primary and secondary are 500...

    Text Solution

    |