Home
Class 12
PHYSICS
In a potentiometer experiment the balanc...

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

`3.6 Omega`

B

`2.4 Omega`

C

`1.2Omega`

D

`0.6 Omega`

Text Solution

Verified by Experts

The correct Answer is:
A, 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

What is internal resistance of a cell?

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

Two resistances 99 ohms and 1 ohm are connected in parallel. Find the current in each when the main current in the circuit is 10 ampere.

In a potentiometer experiment, it is found that no current passes through the galvanometer, when the terminals of a cell are connected across 50 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 ohm, the balance point is found at 40 cm of the wire from the same end. Find the internal resistance of the cell.

The potential difference between the terminals of a cell in open circuit is 2.2V. When it is connected through a resistance of 5 ohm , the P.D. falls to 1.8V. Find the internal resistance of the cell.

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?

BINA LIBRARY-CURRENT ELECTRICITY-EXERCISE
  1. The resistance in two gaps of a meter bridge are 10 Omega and 30 Omega...

    Text Solution

    |

  2. What is a potentiometer? Why is it most accurate device in measuring e...

    Text Solution

    |

  3. In a potentiometer experiment the balancing length with a cell is 560 ...

    Text Solution

    |

  4. Two resistances are joined in parallel whose resultant is 6/5 ohms. On...

    Text Solution

    |

  5. The smallest resistance obtained by connecting 50 resistance of 1/4 oh...

    Text Solution

    |

  6. How many different combinations of three equal resistors can be made ?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  13. The electrical resistance of metals

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. Ampere second is the unit of

    Text Solution

    |