Home
Class 12
PHYSICS
The enstivity of a galvanometer is 60"di...

The enstivity of a galvanometer is `60"div"//Ampere`. When a shunt is used, its senstivity becomes `10"div"//Ampere`. If the resistance of the galvanometer is` 20 Omega`,then the value of the shunt used is

A

`5 Omega`

B

`4 Omega`

C

`15 Omega`

D

`20 Omega`

Text Solution

Verified by Experts

The correct Answer is:
B
If N is the number of divisions on the galvanometer scale, then`I_g=N/60 and I=N/10 therefore I_g=(S/(S+G))IthereforeN/10therefore6S=S+20thereforeS=4Omega`.
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

The sensitivity of a galvanometer is 60 divisions/Amp. When a shunt is used, its sensitivity becomes 10 divisions Amp. If the galvanometer is of resistance 20 Omega , the value of shunt used is:

A galvanometer has a sensitivity of 60 division/ampere. When a shunt is used its sentivity becomes 10 divisions/ampere. What is the value of shunt used if the resistance of the galvanometer is 20Omega ?

A galvanometer has a current sensitivity of 4 div/microampere. If the resistance of the galvanometer is 100 Omega , its voltage sensitivitiy will be

A galvanometer has a current sectivuty of 2 div/microampere . If the resistance of the galvanometer is 100Omega , its voltage senstivity will be

The sensitivity of a galvanometer that measures current is decreased by 1//40 times by using shunt ressitance of 10Omega . Then, value of resistance of the galvanometer is

The deflection in a moving coil galvanometer is reduced to half, when it is shunted with a resistance 40 Omega . The resistance of the galvanometer is

A moving coil galvanometer has a current sensitivity of xx div/ma and voltage senstivity of Y div/V. What is the resistance pf thr galvanometer?

In an ammeter 10% of main current is passing through the galvanometer. If the resistance of the galvanometer is G, then the shunt resistance, in ohms is

A galvanometer has resistance 500 ohm . It is shunted so that its senstivity decreases by 100 times. Find the shunt resistance.

The sensitivity of a galvanometer of resistance 990Omega is increased by 10 times. The shunt used is

MARVEL PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-MCQ
  1. If 10% of the main current is to be passsed through a maving coil galv...

    Text Solution

    |

  2. The deflection in a galvanometer decreases to 1/5th of the original de...

    Text Solution

    |

  3. The enstivity of a galvanometer is 60"div"//Ampere. When a shunt is us...

    Text Solution

    |

  4. If a galvanometer is shunted by (1/n)th of the value of its resistance...

    Text Solution

    |

  5. Of the two identical galvanometers one is to be converted into an amme...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |