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

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

A

4A

B

2A

C

6A

D

10A

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

In an ideal transformer, the number of turns in primary and secondawry coils are 2,000 and 100 respectively. If maximum votlage in primary is 120 V, what is maximum voltage in secondary?

In an ideal transformer, number of turns in primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, calculate current in parimary.

In an ideal transformer, number of turns in primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, calculate output voltage

Ratio of number of turns in primary and secondary coil of 440V-22000V step up transformer is

A transformer of 100% efficiency has 500 turns in the primary and 10,000 turns in the secondary coil. If the primary is connected to 220V mains supply, what is the voltage across the secondary coil?

What are primary and secondary metabolites?

When a voltage of 120 V is impressed across the primary of a transformer, the current in the primary is 1.85 mA. Find the voltage across the secondary, when it delivers 150 mA. The transformer has an efficiency of 95 %.

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. In a transformer, number of truns in the primary is 140 and that in th...

    Text Solution

    |

  2. For current entering at A, the electric field E(r at a distance r form...

    Text Solution

    |

  3. A material 'B' has twice the specific resistance of 'A'. A circular wi...

    Text Solution

    |

  4. The length of a given cylindrical wire is increased by 100%. Due to th...

    Text Solution

    |

  5. If a wire is stretched to make it 0.1% longer, its resistance of will

    Text Solution

    |

  6. An electric current is passed through a circuit containing two wires o...

    Text Solution

    |

  7. By increasing the temperature, the specific resistance of a conductor ...

    Text Solution

    |

  8. A strip of copper another of germanium are cooled from room temperatur...

    Text Solution

    |

  9. The difference in the variation o resistance with temperature in a met...

    Text Solution

    |

  10. The thermistors are usually made of

    Text Solution

    |

  11. The resistance of a bulb filmanet is 100Omega at a temperature of 100^...

    Text Solution

    |

  12. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

    Text Solution

    |

  13. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  14. An electric bulb is rated 220 V and 100 W. when it is operated on 110 ...

    Text Solution

    |

  15. An 220 volt-1000 watt bulb is connected across a 110 volt mains supply...

    Text Solution

    |

  16. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  17. If in the circuit, power dissipation is 150 W, then R is

    Text Solution

    |

  18. A wire when connected to 220 V mains supply has power dissipation P1. ...

    Text Solution

    |

  19. The resistance of the series combination of two resistances is S. WHen...

    Text Solution

    |

  20. A 3 V battery with negligible internal resistance is connected in a ci...

    Text Solution

    |

  21. What will be the value of current through 2Omega resistance for the ci...

    Text Solution

    |