Home
Class 12
PHYSICS
In a transformer, number of turns in the...

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

A

`4A`

B

`2A`

C

`6A`

D

`10A`

Text Solution

Verified by Experts

The correct Answer is:
B
`(V_(p))/(V_(s))=(i_(s))/(i_(p))impliesi_(s)=4xx(140)/(280)=2A`
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    A2Z|Exercise AIIMS Questions|27 Videos

  • ELECTRIC POTENTIAL & CAPACITANCE

    A2Z|Exercise Section D - Chapter End Test|29 Videos

  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

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 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

The number of turns in primary and secondary coils of a transformer is 50 and 200, respectively. If the current in the primary coil is 4 A, then current in the secondary coil is

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 :

The number of turns in the primary coil of a transformer are 100 and that in the secondary coil are 200. What type of transformer is it ? If the input voltage in the primary coil of the transformer is 200 V, find the output voltage in the secondary coil of the transformer.

A transformer has 800 loops in its primary coil and 8,000 loops in its secondary coil What would be the voltage in the primary coil if the- voltage in the.secondary coil is 20,000V.

An ideal step -up transformer has a primarycoil of 120 turns . The transformation ratio is 100 . If the input voltage and power are 230 V and 1000 W respectively, calculate (i) number of turns in the secondary coil . (ii) voltage across the secondary coil. (iii) current in the primary coil . (iv) current in the secondary coil. (v) power in the secondary coil.

A2Z-ELECTROMAGNETIC INDUCTION-Section D - Chapter End Test
  1. A small coil is introduced between the poles of an electromagnet so th...

    Text Solution

    |

  2. Two circular coils A and B are facing each other as shown in figure. T...

    Text Solution

    |

  3. If in a coil rate of change of area is (5meter^(2))/(milli second)and ...

    Text Solution

    |

  4. Two coils P and Q are placed co-axially and carry current I and I' re...

    Text Solution

    |

  5. The phase difference between the flux linkage and the induced e.m.f. i...

    Text Solution

    |

  6. A hundred turns of insulated copper wire are wrapped around an iron cy...

    Text Solution

    |

  7. In circular coil, when no. of turns is doubled and resistance becomes ...

    Text Solution

    |

  8. In a transformer, number of turns in the primary coil are 140 and that...

    Text Solution

    |

  9. Two coil are placed close to each other. The mutual inductance of the ...

    Text Solution

    |

  10. When the current changes from +2A to -2A in 0.05 second, an e.m.f. of ...

    Text Solution

    |

  11. A coil having n turns and resistance R Omega is connected with a galva...

    Text Solution

    |

  12. A metal conductor of length 1m rotates vertically about one of its end...

    Text Solution

    |

  13. A coil of inductance 300mh and resistance 2Omega is connected to a sou...

    Text Solution

    |

  14. A small square loop of wire of side l is placed inside a large square ...

    Text Solution

    |

  15. A circular loop of radius R, carrying current I, lies in x-y plane wit...

    Text Solution

    |

  16. A metallic square loop ABCD is moving in its own plane with velocity v...

    Text Solution

    |

  17. As shown in the figure, P and Q are two coaxial conducting loops separ...

    Text Solution

    |

  18. A short-circuited coil is placed in a time-varying magnetic field. Ele...

    Text Solution

    |

  19. Assertion: The quantity L//R possesses dimensions of time. Reason: T...

    Text Solution

    |

  20. Asseration: Acceleration of a magnet falling through a long soleneoid ...

    Text Solution

    |