Home
Class 12
PHYSICS
An unknown resistance X is to be determi...

An unknown resistance X is to be determined using resistances `R_1, R_2 or R_3`. Their corresponding null points are A, B and C. Find which of the above will give the most accurate reading and why?
. `R= R_1 or R_2 or R_3`.

Text Solution

Verified by Experts

The correct Answer is:
This is true for `r_(1)=r_(2);` so `R_(2)` given most accurate value
Promotional Banner

Topper's Solved these Questions

  • SEMICONDUCTORS

    BANSAL|Exercise Exercise-4 Section-B|6 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise CBSE Question|32 Videos

  • SEMICONDUCTORS

    BANSAL|Exercise Exercise-3|24 Videos

  • MASTER PRACTICE PROBLEM

    BANSAL|Exercise Additional topic|70 Videos

  • TEST PAPERS

    BANSAL|Exercise PHYSICS PART C|14 Videos
BANSAL-SEMICONDUCTORS-Exercise-4
  1. The pitch of a screw gauge is 1 mm and there are 100 division on the c...

    Text Solution

    |

  2. Draw the circuit for experimental verification of Ohm's law using a so...

    Text Solution

    |

  3. An unknown resistance X is to be determined using resistances R1, R2 o...

    Text Solution

    |

  4. In a resonance column method, resonance occurs at two successive level...

    Text Solution

    |

  5. The side of a cube is measured by vernier callipers (10 divisions of a...

    Text Solution

    |

  6. Graph of position of image vs position of point object from a convex l...

    Text Solution

    |

  7. In a screw gauge, the zero of mainscale coincides with fifth division ...

    Text Solution

    |

  8. A student performs an experiment for determination of g [ = ( 4 pi^(2...

    Text Solution

    |

  9. In an experiment to determine the focal length (f) of a concave mirror...

    Text Solution

    |

  10. Some physical quantities are given in Column I and some possible SI un...

    Text Solution

    |

  11. A student performs an experiment to determine the Young's modulus of a...

    Text Solution

    |

  12. Student I ,II , and III perform an experiment for measuring the accele...

    Text Solution

    |

  13. A student uses a simple pendulum of exactly 1m length to determine g, ...

    Text Solution

    |

  14. A vernier calipers has 1mm marks on the main scale. It has 20 equal di...

    Text Solution

    |

  15. The density of solid ball is to be determined in an experiment the dia...

    Text Solution

    |

  16. A meter bridge is set up as shown, to determine an unknown resistance ...

    Text Solution

    |

  17. In the determination of Young's modulus (Y = (4MLg)/(pi// d^2) ) by us...

    Text Solution

    |

  18. The diameter of a cylinder is measured using a vernier callipers with ...

    Text Solution

    |

  19. Using the expression 2d sin theta = lambda, one calculates the values ...

    Text Solution

    |

  20. During Searle's experiment, zero of the Vernier sacle lies between 3.2...

    Text Solution

    |