Home
Class 12
PHYSICS
A galvanometer with a coil resistance of...

A galvanometer with a coil resistance of `100Omega` shows a full-scale deflection when a current of 1 mA is passed through it. What is the value of the resistance which can convert this galvanometer into an ammeter showing a full-scale deflection for a current of 10A?
A resistance of the required value is available but it will get burnt if the energy dissipated in it is greater than 1W. Can it be used for the conversion of the galvanometer described above? [Hint:Power dissipated =`I^(2)`watt)

Text Solution

Verified by Experts

The correct Answer is:
`0.01Omega` yes
Promotional Banner

Topper's Solved these Questions

  • GALVANOMETERS: AMMETER AND VOLTMETERS

    NN GHOSH|Exercise Exercise|32 Videos

  • FUNDAMENTAL OF CURRENT ELECTRICITY

    NN GHOSH|Exercise Exercises|45 Videos

  • GAUSS THEOREM AND ITS APPLICATION

    NN GHOSH|Exercise EXAMPLES(a)|24 Videos

Similar Questions

Explore conceptually related problems

A galvanometer with a coil resistance of 100Omega shows a full-scale deflection when a current of 1 mA is passed through it. What is value of the resistance which can convert this galvanometer into an ammeter showing a full scale deflection for a current 10 A? A resistance of the required value is available but it will get burnt if the energy dissipated in it is greater then 1 W. Can it be used for the conversion of the galvanometer described above?

A galvanometer having a coil resistance of 100 omega gives a full scale deflection , when a current of 1 mA is passed through it. The value of the resistance, which can convert this galvanometer into ammeter giving a full scale deflection for a current of 10A , is :

A galvanometer having a coil resistance 200 Omega gives a full scale deflection when a current of 1mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 50 V?

A galvanometer having a coil resistance 100 Omega given full scale deflection when a current of 1mA is passed throught it . What is the value of the resistance which can convert this galvanometer into a voltmeter giving full scale deflection for a potential difference of 10 V ?

A galvanometer with a coil of resistance 50 Omega shows full-scale deflection when 10 mA current passes through it.

NN GHOSH-GALVANOMETERS: AMMETER AND VOLTMETERS-Exercise
  1. A voltmeter with a resistance of 8000Omega is used to measure the emf ...

    Text Solution

    |

  2. A cheap voltmeter with an internal resistance of 30Omega is connected ...

    Text Solution

    |

  3. A voltmeter of range of 10 V and resistance 5000 Omega is connected in...

    Text Solution

    |

  4. There is a milliameter, each division of which reads 1 mA. It has a re...

    Text Solution

    |

  5. An ammeter of resistance 0.02 Omega is connected in the usual may to a...

    Text Solution

    |

  6. A voltmeter of resistance 3000Omega can read up to 10 V. how would you...

    Text Solution

    |

  7. A millimmater of resistance 20Omega reads up to 50 mA. Explain how the...

    Text Solution

    |

  8. A battery of emf 5V and internal resistance 20Omega is connected to a ...

    Text Solution

    |

  9. A 150 V voltmeter has a resistance of 20,000Omega when connected in se...

    Text Solution

    |

  10. A moving coild galvanometer of resistance 20Omega gives a full scale d...

    Text Solution

    |

  11. Two tangent galvanometer of 50 and 100 tunrs of the same wire and radi...

    Text Solution

    |

  12. A 600Omega resistor and a 400Omega resistor are connected in series ac...

    Text Solution

    |

  13. Three voltmeters A, B and C have the same range but different resistan...

    Text Solution

    |

  14. A galvanometer with a coil resistance of 100Omega shows a full-scale d...

    Text Solution

    |

  15. When the modified galvanometer of exercise 26 is connected across the ...

    Text Solution

    |

  16. An ammeter and a voltmeter are connected in series to a battery of emf...

    Text Solution

    |

  17. An ammeter and a voltmeer are connected as in figures in order to ...

    Text Solution

    |

  18. It is required to measure the resistance ofa circuit operating at 120V...

    Text Solution

    |

  19. A resistance DeltaR=1980 Omega is connected in series with a voltmeter...

    Text Solution

    |

  20. What should the resistance of the sections of a rheostat R(1), R(2) an...

    Text Solution

    |