Home
Class 12
PHYSICS
Twelve cells each having the same e.m.f...

Twelve cells each having the same e.m.f are connected in series and are kept to a closed box. Some of the cell are connected in reverse order .The battery is connected in series with an ammeter an external resistance `R` and two cells of the same type as an in the battery .The current when they and support each other is `3` ampere and current is `2` ampare when the two oppose each other. How many cells are connected in servese order ?

Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    SL ARORA|Exercise Problems For Self|101 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

Twelve cells each having the same e.m.f are connected in series and are kept to a closed box. Some of the cell are connected in reverse order .The battery is connected in series with an ammeter an external resistance R and two cells of the same type as an in the battery .The current when they and such each other is 3 ampere and current is 2 ampare when the two oppose each other. How many cells are connected in servese order ?

32 cells each of emf 3V are connected in series and kept in a not External the combination shown as emf 84 V How many number of cells are connected reversely?

A cell of e.m.f (E) and internal resistance (r) is connected in series with an external resistance (nr.) then the ratio of the terminal p.d. to E.M.F is

There are n cells, each of emf E and internal resistance r, connected in series with an external resistance R. One of the cells is wrongly connected, so that it sends current in the opposite direction. The current flowing in the circuit is

A battery of electro motive force E is connected in series with a resistance R and a voltmeter. An ammeter is connected in parallel with the battery.

N batteries each of emf E and internal resistance r are first connected in series and then in parallel to an external resistance R. if current through R is same in both cases then.

SL ARORA-CURRENT ELECTRICITY-Problems From Competitive
  1. The resistance of a wire is R ohm. What will be its new resistance if ...

    Text Solution

    |

  2. A copper wire iis stretched to make it 0.1% longer. What is the percen...

    Text Solution

    |

  3. A uniform copper wire of mass 2.23xx10^(-3) kg carries a current of 1 ...

    Text Solution

    |

  4. One metre long metallic wire is broken into two unequal parts P and Q....

    Text Solution

    |

  5. The area of cross-section, length and density of a piece of a metal of...

    Text Solution

    |

  6. The lengths and radii of three wires of same metal are in the ratios ...

    Text Solution

    |

  7. Find in the given network of resistors, the equivalent resistance betw...

    Text Solution

    |

  8. A cell of emf 3.4 V and internal resistance 3 Omega is connected to an...

    Text Solution

    |

  9. A battery of emf E is connected with there resistance R , 2R and 3R in...

    Text Solution

    |

  10. Two resistance of 400 Omega and 800 Omega are connected in series with...

    Text Solution

    |

  11. Twelve cells each having the same e.m.f are connected in series and...

    Text Solution

    |

  12. In the circuit shown in Fig. 4.41, calculate the current in each resis...

    Text Solution

    |

  13. Calculate the steady-state current through 2 Omega resistor in the cir...

    Text Solution

    |

  14. Five 4 Omega resistances, a 2 V battery and an ammeter are connected s...

    Text Solution

    |

  15. Two cells of same emf epsilon, but different internal resistances r(1)...

    Text Solution

    |

  16. Find the emf epsilon and the internal resistance r of an electric sour...

    Text Solution

    |

  17. (i) What value of R(1) in the given network will make the equivalent r...

    Text Solution

    |

  18. Calculate the current shown by the ammeter A in the circuit shown in F...

    Text Solution

    |