Home
Class 12
PHYSICS
A certain current on passing through a g...

A certain current on passing through a galvanometer produces a deflection of 100 divisions. When a shunt of one ohm is connected, across it, the same current prodcues a deflection of 1 division. What is the falvanometern resistance?`

A

`10Omega`

B

`9.9 Omega`

C

`100 Omega`

D

`99 Omega`

Text Solution

Verified by Experts

The correct Answer is:
D

The deflection `(theta)` is proportional to (i).`i_g/I=S/(S+G)therefore1/100=1/(1+G)thereforeG+1=100 therefore G=99Omega`.
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES ,THERMODYNAMICS AND RADIATION

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP - 9|30 Videos
  • MAGNETISM

    MARVEL PUBLICATION|Exercise TEST YOUR GRASP|15 Videos

Similar Questions

Explore conceptually related problems

When a current of 1 A pass through a galvanometer, deflection produced in it is........

When a current of 1 Ampere is passed through a galvanometer coil, it is deflected through 20◦. But when it is shunted by a resistance of 12 Omega the same current produces a deflection of 5◦. The resistance of the galvanometer is

A current of 10 A produces a deflection of 45^(@) in a tangent galvanometer. What is the value of the current which will produce a deflection of 30^(@) in the same galvanometer?

The deflection in a MCG is reduced from 40 divisions to 10 divisions, when a shunt of 10 Omega is joined across it. What is the resistance of the galvanometer coil ?

A moving coil galvanometer shows deflection of 100 divisions when 20 A current is passed through it.If resistance of galvanometer coil is 50ohm ,then find voltage sensitivity of galvanometer.

A current of 0.5 A prioduces a deflection of 45^(@) in a tangent galvanometre. What current will produce a deflection of 30^(@) in the same tangent galvanometer.

In a tangent galvanometer a deflection of 30^(@) is obtained wth a certain current flowing through the coil. If the current is tripled, the deflection obtained will be

MARVEL PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-MCQ
  1. Of the two identical galvanometers one is to be converted into an amme...

    Text Solution

    |

  2. A galvanometer of 25 Omega resistance can read a maximum current of 6 ...

    Text Solution

    |

  3. A certain current on passing through a galvanometer produces a deflect...

    Text Solution

    |

  4. An ammeter is obtained by shunting a 30 Omega galvanometer with a 30 O...

    Text Solution

    |

  5. If an ammeter is to be used in place of a voltmeter, then we must conn...

    Text Solution

    |

  6. In a ammeter 0.2% of main current passes through the galvanometer. If ...

    Text Solution

    |

  7. A galvanometer has a resistance of G ohm and range of V volt. Calculat...

    Text Solution

    |

  8. We have a galvanometer of resistance 25 Omega. It is shunted by a 2.5 ...

    Text Solution

    |

  9. A galvanometer has a resistance of 3663Omega. A shunt S is connected a...

    Text Solution

    |

  10. To decrease the range of an ammeter its resistance need to be incre...

    Text Solution

    |

  11. A galvanometer has a sensitivity of 60 division/ampere. When a shunt i...

    Text Solution

    |

  12. A voltmeter of range 0-10V and resistance 200 Omega cannot be used as ...

    Text Solution

    |

  13. A galvanometer of resistance 50 Omega is connected to a battery of 3 ...

    Text Solution

    |

  14. By mistake, a voltmeter is connected in series and an ammeter is conne...

    Text Solution

    |

  15. An ammeter has an internal resistance of 50 Omega when it is connected...

    Text Solution

    |

  16. A galvanometer whose resistance is 120 Omega gives full scale deflecti...

    Text Solution

    |

  17. When a resistance of 100Omega is connected in series with a galvanomet...

    Text Solution

    |

  18. A moving coil galvanometer is converted into an ammeter reads upto 0.0...

    Text Solution

    |

  19. An electrical meter of internal resistance 20 Omega gives a through it...

    Text Solution

    |

  20. When a galvanometer is shunted by resistance S, then its current capac...

    Text Solution

    |