Home
Class 12
PHYSICS
The balancing lengths of potentiometer w...

The balancing lengths of potentiometer wire are `l_(1)` and `l_(2)` when two cells of emf `E_(1)` and `E_(2)` are connected in the secondary circuit in series first to help each other and next to oppose each other `(E_(1))/(E_(2))` is equal to `(E_(1)gt E_(2))`.

A

`(l_(1))/(l_(2))`

B

`(l_(1)-l_(2))/(l_(1)+l_(2))`

C

`(l_(1)+l_(2))/(l_(1)-l_(2))`

D

`(l_(2))/(l_(1))`

Text Solution

Verified by Experts

The correct Answer is:
C
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. A cell of negligible internal resistance is connected to a potentiomet...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  4. At the moment when the potentiometer is balanced

    Text Solution

    |

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

    Text Solution

    |

  6. Sensitivity of potentiometer

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  16. The meter bridge can be used a) to determine an unknown resistance ...

    Text Solution

    |

  17. Potentiometer can be used a) for measurement of emf of cell b) to ...

    Text Solution

    |

  18. Sensitivity of potentiometer can be increased by a) increasing serie...

    Text Solution

    |

  19. Choose the correct statements from the following a) in potentiometer...

    Text Solution

    |

  20. Match list - I with List - II

    Text Solution

    |