Home
Class 12
PHYSICS
The ends of a resistance are connected t...

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.

Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    SL ARORA|Exercise Problems From Competitive|18 Videos

  • CURRENT ELECTRICITY

    SL ARORA|Exercise Problems For Self|101 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 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.

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.

Find the current drawn from a cell of emf 2 V and internal resistance 2 Omega connected to the network given below.

Two coils have a combined resistance of 9 Omega when connected in series and 2 Omega when connected in parallel. Find the resistance of each coil.

Four cell each of emf 2 V and internal resistance 1 ohm are connected n parallel with an external resistance of 6 ohm. The current in the external resistance is

Four cells, each of emf E and internal resistance r, are connected in series across an external resistance reverse. Then, the current in the external circuit is

24 cells of emf 1.5 V each having internal resistance of 1 Omega are connected to an external resistance of 1.5Omega . To get maximum current,

A cell of emf 2 volt and internal resistance 1.5 Omega is connected to the ends of 1 m long wire. The resistance of wire is 0.5 Omega/m . Find the value of potential gradient on the wire.

SL ARORA-CURRENT ELECTRICITY-Problems For Self
  1. The ends of a resistance are connected to 19 cells in series, each of ...

    Text Solution

    |

  2. One billion electrons pass from a point P towards another point Q in 1...

    Text Solution

    |

  3. Calculate the number of free electrons passing through the filament of...

    Text Solution

    |

  4. In the electrolysis of silver chloride, a charge of 4xx10^(5) C is flo...

    Text Solution

    |

  5. In a hydrogen atom, the electron makes about 0.6xx10^(16) revolutions ...

    Text Solution

    |

  6. An electron gun emits 2.0xx10^(16) electrons per second. What is the a...

    Text Solution

    |

  7. An electric current of 2.0 mu A exists in a discharge tube. How much c...

    Text Solution

    |

  8. An electron moves in a circular orbit of radius 10 cm with a constant ...

    Text Solution

    |

  9. The current through a wire depends on time as I=I(0)+alpha t, where I(...

    Text Solution

    |

  10. A current of 4.8 A is flowing in a copper wire of cross-sectional area...

    Text Solution

    |

  11. A voltage of 30 V is applied across a colour coded carbon resistor wit...

    Text Solution

    |

  12. The sequence of bands marked on a carbon resistor is yellow , red oran...

    Text Solution

    |

  13. The resistance of a conductivity wire of length 1.1 m and of diameter ...

    Text Solution

    |

  14. A metal wire of specific resistance 64xx10^(-6) Omega m and length 1.9...

    Text Solution

    |

  15. A negligbly small current is passed through a wire of length 15 cm and...

    Text Solution

    |

  16. Calculate the resistance of a 2 m long nichrome wire of radius 0.321 m...

    Text Solution

    |

  17. Find the resistance of a hollow cylindrical conductor of length 1.0m a...

    Text Solution

    |

  18. Calculate the electric field in a copper wire of cross-sectional area ...

    Text Solution

    |

  19. A given copper wire of resistance R is stretched to reduce its diamete...

    Text Solution

    |

  20. What will be the change in resistance of a constantan wire when its ra...

    Text Solution

    |

  21. A wire of resistance 10 Omega is drawn out so that its length is thric...

    Text Solution

    |