Home
Class 12
PHYSICS
When 10 cells in series are connected to...

When 10 cells in series are connected to the ends of a resistance of `59 Omega`, the current is found to be 0.25 A, but when the same cells after being connected in parallel are joined to the ends of a `0.05 Omega `, the current is 25 A. Calculate the internal resistance and emf of each cell.

Text Solution

Verified by Experts

The correct Answer is:
`0.1 Omega, 1.5 V`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    SL ARORA|Exercise Problems From Competitive|18 Videos

  • CHEMICAL EFFECT OF CURRENT

    SL ARORA|Exercise TYPE-B|5 Videos

  • ELECTRIC POTENTIAL AND ELECTRIC FLUX

    SL ARORA|Exercise Problems for self practive|61 Videos

Similar Questions

Explore conceptually related problems

When 10 identical cells in sereis are connected to the ends of a resistance of 59Omega , the current is found to be 0.25A. But when the nsame cells, being connected in parallel, are joined to the ends of a resistance of 0.05Omega, the current is 25A. Calculate the internal resistance and the emf of each cell.

Three cells each of emf 1.5 V, after being connected in series with each other, are connected to the ends of a resistance. The current obtained is 1 A. When the cells are connected in parallel across the ends of the same resistance, the current is found to be 0.36 A. Find the external resistance and the internal resistance of each cell.

The ends of a resistance are connected to 19 cells in series, each of resistance 0.1 Omega . The current is found to be 2 A. The number of cells is reduced to 15 and an extra resistance of 9.5 Omega is connected in series to the given resistance. The current becomes one-half. Find the given resistance and emf of each cell.

5When a cell of emf E and internal resistance r, is connected to the ends of a resistance R, then current through resistance is I. If the same cell is connected to the ends of a resistance R/2 then the current would be-

A battery of unknown emf and internal resistance is given to a student for the experiment. When student connects the battery to an external resistance of 10 Omega then 1A current flows through the circuit and when the same is connected to 15 Omega resistance then 0.75 A current flows through the circuit . Calculate the emf and internal resistance of the given battery.

Two identical cells whether connected in parallel or in series gives the same current, when connected to an external resistance 1.5Omega . Find the value of internal resistance of each cell.

A galvanometer together with an unkonwn resistance in series is connected across two identical cells, each of emf 1.5 V. When the cells are connected inseries, the galvanometer records a current of 1 A and when the cells are connected in parallel, the current =0.6 A. What is the internal resistance of each cell ?

When a bettery is connected to the resistance of 10Omega the current in the circuit is 0.12 A the same battery gives 0.07A current with 20Omega calculate e.m.f and internal resistance of the battery.

SL ARORA-CURRENT ELECTRICITY-Problems For Self
  1. Find the potential difference between the points A and B in the circui...

    Text Solution

    |

  2. The reading of a voltmoter when a cell is connected to it is 2.2 V. Wh...

    Text Solution

    |

  3. The potential difference across a cell is 1.8 V when a current of 0.5 ...

    Text Solution

    |

  4. The potential difference of a cell in an open circuit is 6 V, which fa...

    Text Solution

    |

  5. In the circuit shown in Fig. 4.67, the resistance of the ammeter A is ...

    Text Solution

    |

  6. The potential differnce between the terminals of a battery of emf 6.0 ...

    Text Solution

    |

  7. The potenital difference between the terminals of a 6.0 V battery is 7...

    Text Solution

    |

  8. A battery of emf 2 V and internal resistance 0.5 Omega is connected ac...

    Text Solution

    |

  9. When a resistance of 2 Omega is placed across the terminals of a batte...

    Text Solution

    |

  10. The emf of a battery is 4.0 V and its internal resistance is 1.5 Omega...

    Text Solution

    |

  11. 10 cells, each of internal resistance 0.5 Omega and 1.2 V emf are conn...

    Text Solution

    |

  12. Two cells of 1.5 V and 2 V , having internal resistances of 1Omega an...

    Text Solution

    |

  13. Three identical, each of emf 2 V and internal resistance 0.2 Omega are...

    Text Solution

    |

  14. Three identical cells each of emf 2 V and unknown internal resistance ...

    Text Solution

    |

  15. In the circuit shown in Fig. 4.68, the cells epsilon(1) " and " epsilo...

    Text Solution

    |

  16. A 20 V battery of internal resistance 1 Omega is connected to three co...

    Text Solution

    |

  17. Two cells connected in series have electromotive force of 1.5 V each. ...

    Text Solution

    |

  18. Find the minimum number of cells required to produce an electric curre...

    Text Solution

    |

  19. How would you arrange 64 similar cells each having an emf of 2.0 V and...

    Text Solution

    |

  20. When 10 cells in series are connected to the ends of a resistance of 5...

    Text Solution

    |