Home
Class 12
PHYSICS
Sensitivity of a moving coil galvanomet...

Sensitivity of a moving coil galvanometer can be increased by

A

decreasing the number of turns of the coil

B

increasing the number of turns of the coil

C

decreasing the area of the coil

D

by using a weak magnet

Text Solution

Verified by Experts

The correct Answer is:
B
Current senstivity,`S_i=(nAB)/K`. It can be increased n,A,B and by decreasing K.
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

Sensivitivity of a moving coil galvanometer can be increased by

Write two factors by which the current sensitivity of a moving coil galvanometer can be increased?

The sensitiveness of a moving coil galvanometer can be increased by decreasing

If the current current sensitivity of a moving coil galvanometer is increased by 20% , its resistance also increases by 1*5 times. How will the voltage sensitivity of the galvanometer be affected?

Assertion : The sensitivity of a moving coil galvanometer is increased by using a soft iron cylinder as a core inside the coil. Reason : Soft iron has a high magnetic permeability and cannot be easily magnetised or demagnetised.

The current sensitivity of a moving coil galvanometer increases by 35% , when its resistance is increased by a factor 3. The voltage sensitivity of galvanometer changes by a factor

MARVEL PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-MCQ
  1. The senstivity of a milliammeter of range 0 to 100 mA is x div/millia...

    Text Solution

    |

  2. A conducting circular loop of radius r carries a constant i. It is pla...

    Text Solution

    |

  3. Sensitivity of a moving coil galvanometer can be increased by

    Text Solution

    |

  4. The magnetic field inside a solenoid is

    Text Solution

    |

  5. What is the magnetic field at the cemter of a coil in the form of a sq...

    Text Solution

    |

  6. Three moving coil galvanometer A,B and C are made of coils of thr...

    Text Solution

    |

  7. A moving coil galvanometer has 150 equal divisions. Its current sensit...

    Text Solution

    |

  8. A coil in the shape of an equilateral triangle of side l is suspended ...

    Text Solution

    |

  9. A square current carrying loop is suspended in a unifrom magnetic ...

    Text Solution

    |

  10. A moving coil galvanometer has a voltage senstivity of I division per ...

    Text Solution

    |

  11. To increase the current sensitivity of a moving coil galvanometer by 5...

    Text Solution

    |

  12. If only 1% of the total current is to be passed through a galvanometer...

    Text Solution

    |

  13. A galvanometer having a resistance of 18 Omega is shunted by a wire of...

    Text Solution

    |

  14. An ammeter has a resistance R and a range I. To increase its range to ...

    Text Solution

    |

  15. When a current of 1 Ampere is passed through a galvanometer coil, it i...

    Text Solution

    |

  16. A galvanometer of resistance 100 Omega, gives a full scale deflection ...

    Text Solution

    |

  17. A galvanometer of resistance 20 Omega has current senstivity of 5 div/...

    Text Solution

    |

  18. The combinant resistance of a galvanometer of resistance 500 Omega and...

    Text Solution

    |

  19. An ammeter of resistance 50 Omega reads 0.5 A, when connected in a cir...

    Text Solution

    |

  20. An ammeter consists of a galvanometer of a resistance 45 Omega shunted...

    Text Solution

    |