Home
Class 12
PHYSICS
When 'n' number of identical cells, each...

When 'n' number of identical cells, each of emf E and internal resistance r are grouped in series, the current flowing through an external resistance R is given by

A

`(nE)/(nR + r)`

B

`(nE)/(R + n r)`

C

`(E)/(nR + r)`

D

`(E)/(R + r)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • MODEL TEST PAPER 6

    KCET PREVIOUS YEAR PAPERS|Exercise PHYSICS|60 Videos

  • PHYSICS

    KCET PREVIOUS YEAR PAPERS|Exercise MCQs|66 Videos

Similar Questions

Explore conceptually related problems

Three similar cells, each of emf 2 V and internal resistance r Omega send the same current through an external resistance of 2 Omega when connected in series or in parallel. The strength of the current flowing through the external resistance is (A)

A battery consists of a variable number (n) of identical cells, each having an internal resistance r connected in series. The terminals of the battery are short - circuited. A graph of current (I) in the circuit verses the number of cells will be as shown in figure.

Five cells each of internal resistance 0.2 Omega and e.m.f. 2V are connected in series with a resistance of 4 Omega . The current through the external resistance is :

Four identical cells of emf E and and internal resistance r are to be connected in series . Suppose if one of the cell is connected wrongly , the equivalent emf and effective internal resistance of the combination is

7 cells each of emf epsilon and internal resistance r are to be connected in series. If due to oversight one cell is connected wrongly, the emf and internal resistance of the combination will be :

(a) Six lead acid type of secondary cells each of 2.0 V and internal resistance 0.015 omega are joined in series to provide a supply resistance of 8.5 omega what are the current drawn from the supply and its terminal voltage (b) A secondary cell after long use has an e.m of 1.9 V and largic internal resistance of 380 omega what maximum current can be draw from the cell ? Could the cell drive the starting motor of a car ?

KCET PREVIOUS YEAR PAPERS-MODEL TEST PAPER 9-Physics
  1. Beta particles before emission from a radioactive element

    Text Solution

    |

  2. The energy equivalent of 5.5 xx 10^(-4) amu in MeV is

    Text Solution

    |

  3. In case of an artificial radiactive transformation as given by .(15)P^...

    Text Solution

    |

  4. The angular momentum of the electron in the second Bohr orbit is

    Text Solution

    |

  5. The radius of a nucleus of a mass number A is directly proportional to...

    Text Solution

    |

  6. As the temperature of hot junction increases, the thermo emf :

    Text Solution

    |

  7. The potential difference across the terminals of a cell of emf 1.1 Vol...

    Text Solution

    |

  8. When 'n' number of identical cells, each of emf E and internal resista...

    Text Solution

    |

  9. The current in c coil of self - inductance 10 mH changes from 0 to 1.5...

    Text Solution

    |

  10. Electric intensity is equal to :

    Text Solution

    |

  11. Two capacitors each of capacitance 2mu f are connected in series. A th...

    Text Solution

    |

  12. The potential difference between two points separated by 1 mm in an el...

    Text Solution

    |

  13. If we place a bar magnet in the magnetic meridian with its north pole ...

    Text Solution

    |

  14. The period of oscillation of a magnet is T in earth's magnetic field. ...

    Text Solution

    |

  15. The needle in the dip circle stands vertical when the plane of the cir...

    Text Solution

    |

  16. The specific rotation of an optically active substance of length Lm an...

    Text Solution

    |

  17. In the diffraction pattern due to single slit of width 'a' with incide...

    Text Solution

    |

  18. Time of exposure for a photographic print is 10 s, when a lamp of 50 c...

    Text Solution

    |

  19. Two lenses of powers + 1.5 D and - 1 D are kept in contact. The focal ...

    Text Solution

    |

  20. The angle of incidence on one face of an equilateral prism is 40^(@) a...

    Text Solution

    |