Home
Class 12
PHYSICS
Potentiometer is an ideal instrument, be...

Potentiometer is an ideal instrument, because 

A

no current is drawn from the source of unknown emf

B

current is drawn from the source of unknown emf

C

it gives deflection even at null point

D

it has variable potential gradient

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - IB|44 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise EXERCISE - II|84 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS|94 Videos

  • CURRENT ELECTRICITY

    AAKASH SERIES|Exercise PROBLEMS (LEVEL-II)|26 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    AAKASH SERIES|Exercise PRACTICE EXERCISEX|44 Videos
AAKASH SERIES-CURRENT ELECTRICITY-EXERCISE - IA
  1. The sensitivity of potentiometer wire can be increased by

    Text Solution

    |

  2. A cell of emf 'E' and internal resistance r connected in the secondary...

    Text Solution

    |

  3. Potentiometer is an ideal instrument, because

    Text Solution

    |

  4. On increasing the resistance of the primary circuit of potentiometer, ...

    Text Solution

    |

  5. If the value of potential gradient on potentiometer wire is decreased,...

    Text Solution

    |

  6. A cell of negligible internal resistance is connected to a potentiomet...

    Text Solution

    |

  7. For the working of potentiometer, the emf of cell in the primary circu...

    Text Solution

    |

  8. The balancing lengths of potentiometer wire are l(1) and l(2) when two...

    Text Solution

    |

  9. At the moment when the potentiometer is balanced

    Text Solution

    |

  10. Temperature coefficient of resistance and resistivity of a potentiomet...

    Text Solution

    |

  11. Sensitivity of potentiometer

    Text Solution

    |

  12. The quantity that cannot be measured by a potentiometer is ..........

    Text Solution

    |

  13. The potential gradients on the potentiometer wire are V(1) and V(2) wi...

    Text Solution

    |

  14. If the current in the primary circuit is decreased, then balancing len...

    Text Solution

    |

  15. Statement - (A) : Thermistor can have only negative temperature coeffi...

    Text Solution

    |

  16. Statement - (A): Resistivity of insulators is about 10^22 times the re...

    Text Solution

    |

  17. Statement - (A) : Series combination of cells is preferred when extern...

    Text Solution

    |

  18. Statement - (A): The difference between a new torch light cell and an ...

    Text Solution

    |

  19. Statement-1:- The temperature dependence of resistance is usually give...

    Text Solution

    |

  20. A depolarizer essentially acts an agent which can prevent a) the cov...

    Text Solution

    |