Home
Class 12
PHYSICS
In a metre bridge, the balancing length ...

In a metre bridge, the balancing length from the left end is 20 cm. The resistance in the right gap is `1 Omega`. The value of the unknown resistance is

A

`0.8 Omega`

B

`0.5 Omega`

C

`0.25 Omega`

D

`0.4 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    BINA LIBRARY|Exercise EXERCISE|107 Videos

  • COMMUNICATION SYSTEM

    BINA LIBRARY|Exercise EXERCISE |64 Videos

  • DUAL NATURE OF MATTER AND RADIATION

    BINA LIBRARY|Exercise EXERCISE|68 Videos

Similar Questions

Explore conceptually related problems

A resistance wire connected in the left gap of a metre bridge balances a 10Ω resistance in the right gap at a point which divides the bridge wire in the ratio 3:2. If the length of the resistance wire is 1.5m, then find the length of 1Ω of the resistance wire.

In a potentiometer experiment the balancing length with a cell is 560 cm. When an external resistance of 10 Omega is connected in parallel to the cell, the balancing length changes to 60 cm. The internal resistance of the cell is

A potentiometer wire of length 100 cm has a resistance of 10 ohm. It is connected in series with a resistance and a battery of emf 2V and of negligible internal resistance. A source of emf 10mV is balanced against a length of 40 cm of the potentiometer wire. What is the value of the external resistance?

In a meterbridge length of the wire is 100cm. At what point balance point be obtained if the resistance are in the ratio 4:5.

Specific resistance of the material of a wire is 44 x 10^6 Omega cm. If the resistance of the wire is 14 Omega and its diameter 1 mm, calculate the length of the wire.

BINA LIBRARY-CURRENT ELECTRICITY-EXERCISE
  1. How many different combinations of three equal resistors can be made ?

    Text Solution

    |

  2. A steady current flows in a metallic conductor of non uniform cross-se...

    Text Solution

    |

  3. A metallic wire of resistance 40 Omega is stretched to twice its lengt...

    Text Solution

    |

  4. A metallic wire is drawn to reduce its diameter to half its original v...

    Text Solution

    |

  5. Three resistances each of 4 Omega are connected to form a triangle. Th...

    Text Solution

    |

  6. Four wires of equal length and of resistance 10 Omega each are connect...

    Text Solution

    |

  7. Assuming that the charge of an electron is 1.6 x 10^-19 C. The number ...

    Text Solution

    |

  8. The electrical resistance of metals

    Text Solution

    |

  9. The resistance of a conductor is 5 Omega at 50°C and 6 Omega at 100°C...

    Text Solution

    |

  10. A piece of copper and another of germanium are cooled from room temera...

    Text Solution

    |

  11. What is the order of the drift velocity of electrons?

    Text Solution

    |

  12. A wire of 4 Omega resistance is bent at 180° at its mid point and twis...

    Text Solution

    |

  13. A and B are two wires of copper of equal cross-section and A is longer...

    Text Solution

    |

  14. If a wire of uniform cross sectional area is cut equally into two part...

    Text Solution

    |

  15. Ampere second is the unit of

    Text Solution

    |

  16. The temperature co-efficient of resistance of a wire is 0.00125 °C^-1....

    Text Solution

    |

  17. Krichhoff's first law deals with conservation of

    Text Solution

    |

  18. The instrument for accurate measurement of emf of a cell is

    Text Solution

    |

  19. In a metre bridge, the balancing length from the left end is 20 cm. Th...

    Text Solution

    |

  20. The sensitivity of a potentiometer can be increased by

    Text Solution

    |