Home
Class 12
PHYSICS
What is a transformer?...

What is a transformer?

Promotional Banner

Topper's Solved these Questions

  • Electromagnetic Induction

    CHETANA PUBLICATION|Exercise EXERCISE|109 Videos

  • Dual Nature of Radiation and Matter

    CHETANA PUBLICATION|Exercise EXERCISE|89 Videos

  • Electrostatics

    CHETANA PUBLICATION|Exercise Exercise|73 Videos

Similar Questions

Explore conceptually related problems

What is transformation? Who discovered it?

State main applications of transformer.

What is the use of transformer

State uses of transformers.

The difference in the working of an amplifier and a step up transformer is

In relation to a transformer, the relation n_p/n_s = 20, indicate that

What is turns ratio of a transformer? What can you say about its value for 1 step- up transformer 2) step down transformer?

A step down transformer works on 220 volts a.c. mains. It is used to light at 100W, 20V bulb. The main current is 0.5A. What is the efficiency of the transformer?

State the principle of transformer. Define efficiency of transformer.State uses of transformers.

The energy is not transformed in the following

CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
  1. What is a transformer?

    Text Solution

    |

  2. A magnetic flux associated with a coil changes by 5xx10^-2 Wb in 25 se...

    Text Solution

    |

  3. The current in one coil increasesfrom0 to 500 mA in 0.1 ms. The induce...

    Text Solution

    |

  4. An emf of 100 mV is induced in a conductor of length 1.2m when it move...

    Text Solution

    |

  5. The current increases at the rate of 10A s^-1 in the coil of inductan...

    Text Solution

    |

  6. The current in a coil changes from zero to 5A in 0.2 seconds, due to w...

    Text Solution

    |

  7. The mutual inductance between the two coils is 2 xx 10^-2H.Due to the ...

    Text Solution

    |

  8. A step down transformer, connected to mains supply 240V is made to ope...

    Text Solution

    |

  9. The primary winding of a transformer has 300 turns and its secondary w...

    Text Solution

    |

  10. A coil of effective area 10m^2 is placed at right angles to a magnetic...

    Text Solution

    |

  11. The current increases at the rate of 10A s^-1 in the coil of inductan...

    Text Solution

    |

  12. A coil of effective area 4m^2 is placed at right angles to a magnetic ...

    Text Solution

    |

  13. A rectangular coil (0.5 m xx 0.4m) has a resistance of 5Omega . The co...

    Text Solution

    |

  14. A rectangular coil (0.5 m xx 0.4m) has a resistance of 5Omega . The co...

    Text Solution

    |

  15. A coil of area 0.75 m^2 and 1000 turns is kept perpendicular to a magn...

    Text Solution

    |

  16. Find the self-inductance of a circuit in which an e.m.f. of 10V is ind...

    Text Solution

    |

  17. The mutual inductance of a pair of coils is 0.75H. If the current in t...

    Text Solution

    |

  18. A step down transformer has 800 turns in the primary. The supply volta...

    Text Solution

    |

  19. A coil of effective area 2m^2 is placed at right angles to a magnetic ...

    Text Solution

    |

  20. The back e.m.f. induced in an inductive coil is 100 V when the current...

    Text Solution

    |

  21. The coefficient of mutual inductance between a pair of coils is 5mH. F...

    Text Solution

    |