Home
Class 12
PHYSICS
Two cells, having the same emf, are conn...

Two cells, having the same emf, are connected in series through an external resistance R. Cells have internal resistance` r_(1) and r_(2) (r_(1) gt r_(2)) `respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of R shown in the figure

Promotional Banner

Topper's Solved these Questions

  • TEXTUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|507 Videos

  • STRUCTURE OF NUCLEUS

    MODERN PUBLICATION|Exercise EXERCISE|47 Videos

  • TEXUAL QUESTIONS

    MODERN PUBLICATION|Exercise EXERCISE|195 Videos

Similar Questions

Explore conceptually related problems

Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R_1 and R_2(R_1gtR_1) . if the potential difference across the source having internal resistance R_2 is zero, then find vlaue of R.

Two resistance r_1 and r_2 (r1< r2) are joined in parallel. The equialent resistane R is such that

A cell of emf 2 V and internal resistance 0.1Omega is connected to 3.9Omega external resistance. What will be the potential difference across the terminals of the cell?

Two cells of the same e.m.f. E but internal resistance r_1 and r_2 are connected in series to an external resistor R (fig. EP 3.25). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero?

n cells of e.m.f E and internal resistance r are connected in series with an external resistance R . the current will increase n times that of a single cell, if

A cell, with finite internal resistance r, is connected across two external resistances R_1 and R_2(R_1> R_2) , one by one. In which case would the terminal potential difference of the cell more ? Justify your anwer.

n cells, each having emf. E and internal resistance r are connected in parallel. What is the net internal resistance of the combination?

Two cells of e.m.f E_1 and E_2 have internal resistance r_1 and r_2 respectively. What is the corresponding formula for the series combination?

MODERN PUBLICATION-TEXTUAL QUESTIONS-EXERCISE
  1. Two cells, having the same emf, are connected in series through an ext...

    Text Solution

    |

  2. For current entering at A, the electric field E(r at a distance r form...

    Text Solution

    |

  3. A material 'B' has twice the specific resistance of 'A'. A circular wi...

    Text Solution

    |

  4. The length of a given cylindrical wire is increased by 100%. Due to th...

    Text Solution

    |

  5. If a wire is stretched to make it 0.1% longer, its resistance of will

    Text Solution

    |

  6. An electric current is passed through a circuit containing two wires o...

    Text Solution

    |

  7. By increasing the temperature, the specific resistance of a conductor ...

    Text Solution

    |

  8. A strip of copper another of germanium are cooled from room temperatur...

    Text Solution

    |

  9. The difference in the variation o resistance with temperature in a met...

    Text Solution

    |

  10. The thermistors are usually made of

    Text Solution

    |

  11. The resistance of a bulb filmanet is 100Omega at a temperature of 100^...

    Text Solution

    |

  12. The resistance of a wire is 5 ohm at 50^@C and 6 ohm at 100^@C. The re...

    Text Solution

    |

  13. The resistance of hot tungsten filament is about 10 times the cold res...

    Text Solution

    |

  14. An electric bulb is rated 220 V and 100 W. when it is operated on 110 ...

    Text Solution

    |

  15. An 220 volt-1000 watt bulb is connected across a 110 volt mains supply...

    Text Solution

    |

  16. A heater coil is cut into two equal parts and only one part is now use...

    Text Solution

    |

  17. If in the circuit, power dissipation is 150 W, then R is

    Text Solution

    |

  18. A wire when connected to 220 V mains supply has power dissipation P1. ...

    Text Solution

    |

  19. The resistance of the series combination of two resistances is S. WHen...

    Text Solution

    |

  20. A 3 V battery with negligible internal resistance is connected in a ci...

    Text Solution

    |

  21. What will be the value of current through 2Omega resistance for the ci...

    Text Solution

    |