Home
Class 12
PHYSICS
When power is drawn from the secondary c...

When power is drawn from the secondary coil of the transformer, the dynamic resistance

A

increases

B

decreases

C

remains unchanged

D

changes erratically

Text Solution

Verified by Experts

The correct Answer is:
A
When power is drawn from the secondary coil of the transfomer, the dynamic resistance decreases.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Example 2|28 Videos

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Example 30|1 Videos

  • ELECTROMAGNETIC INDUCTION

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CONER|34 Videos

  • ELASTICITY

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|16 Videos

  • ELECTRONS AND PROTONS

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise MHT CET CORNER|19 Videos

Similar Questions

Explore conceptually related problems

In the secondary coil of step-up transformer , the number of turns are ___

The number of turns in the secondary coil of a transformer is 20 times that in primary. What value of power will be obtained in secondary, if power fed to primary is 100 watt ?

The alternating voltage induced in the secondary coil of a transformer is mainly due to

In transformer , power of secondary coil is :

The primary and secondary coils of a transformer do not have any electrical contact. How is then electrical energy transferred from primary to secondary ?

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROMAGNETIC INDUCTION-Example 1
  1. For a large industrial city with much load variations, the DC generato...

    Text Solution

    |

  2. In an ideal transfomer, the voltage is step-down from 11 kV to 220 V. ...

    Text Solution

    |

  3. When power is drawn from the secondary coil of the transformer, the dy...

    Text Solution

    |

  4. An electric motor runs a D.C. source of e.m.f. 200 V and draws a curre...

    Text Solution

    |

  5. In step-up transfomer, the relation between number of turns in primary...

    Text Solution

    |

  6. A transformer is used to light a 140 W, 24 V lamp from 240 V AC mains....

    Text Solution

    |

  7. The armature of a DC motor has 20Omega resistance. It draws a current ...

    Text Solution

    |

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

    Text Solution

    |

  9. A step up transformer operates on a 230 V line and a load current of 2...

    Text Solution

    |

  10. The armature of a shunt wound motor can with stand current up to 8 A b...

    Text Solution

    |

  11. A step-down transformer has 50 turns on secondary and 1000 turns on pr...

    Text Solution

    |

  12. A six pole generotar with fixed field excitation developes an e.m.f. o...

    Text Solution

    |

  13. A step-down transfomer reduces the voltage of a transmission line from...

    Text Solution

    |

  14. The e.m.f. induced in a secondary coil is 20000 V when the current bre...

    Text Solution

    |

  15. A current of 5A is flowing at 220V in the primary coil of a transforme...

    Text Solution

    |

  16. Eddy currents are produced when

    Text Solution

    |

  17. The induced emf of a generator when the flux of poles is doubled and s...

    Text Solution

    |

  18. If the coils of a transfomer are made up of thick wire, then

    Text Solution

    |

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

    Text Solution

    |

  20. Which of the following is not transducer?

    Text Solution

    |