Home
Class 12
PHYSICS
Why is that the terminal potential diffe...

Why is that the terminal potential difference is always less than the e.m.f. of a cell?

Text Solution

Verified by Experts

Since V = E - Ir, a part of energy is spent to over come the internal resistance offered by the electrolyte of the cell.
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    SUBHASH PUBLICATION|Exercise TWO MARK QUESTIONS AND ANSWERS|19 Videos

  • CURRENT ELECTRICITY

    SUBHASH PUBLICATION|Exercise THREE MARK QUESTIONS AND ANSWERS|11 Videos

  • COMMUNICATION SYSTEMS

    SUBHASH PUBLICATION|Exercise THREE MARKS QUESTIONS WITH ANSWERS|4 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    SUBHASH PUBLICATION|Exercise NUMERICALS WITH SOLUTIONS|21 Videos

Similar Questions

Explore conceptually related problems

The potential difference between the terminals of a cell in open circuit is 2.2 V. With resistance of 5 Omega across the terminals of a cell, the terminal potential difference is 1.8 V. The internal resistance of the cell is

The variation of terminal potential difference (V) with current flowing through a cell is as shown The emf and internal resistance of the cell are

Two cells of internal resistance r_1 and r_2 and of same emf are connected in series across a resistor of resistance R. If the terminal potential difference across the call of internal resistance r_1 is zero , then the value of R is

A battery of internal resistance 3Omega is connected to 20Omega resistor and the potential difference across the resistor is 10V. If another resistor 30Omega is connected in series with the first resistor and battery is again connectecl to the combination, then calculate the e.m.f and terminal potential difference across the combination..

The potential difference between the terminals of a cell in open circuit is 2.2 volt. With resistance of 5 ohm across the terminals of a cell, the terminal difference is 1.8 volt. The internal resistance of the cell is

Two batteries A and B each of e.m.f. 2V are connected in series to an external resistance R = 1 Omega . If the internal resistance of battery A is 1.9 Omega and that of B is 0.9 Omega . What is the potential difference between the terminals of battery A ?

During absorption of water by roots , the water potential of cell sap is lower than that of

SUBHASH PUBLICATION-CURRENT ELECTRICITY-NUMERICAL PROBLEMS AND ANSWERS
  1. Why is that the terminal potential difference is always less than the ...

    Text Solution

    |

  2. In the given circuit, calculate the effective resistance between A and...

    Text Solution

    |

  3. In the given circuit, calculate the current through the circuit when c...

    Text Solution

    |

  4. In the given circuit, calculate the current through 3Omega resistor, w...

    Text Solution

    |

  5. A battery of internal resistance 3Omega is connected to 20Omega resist...

    Text Solution

    |

  6. A network of resistors is connected to a 12V battery as shown in the f...

    Text Solution

    |

  7. A network of resistors is connected to a 12V battery as shown in the f...

    Text Solution

    |

  8. Two cells of emf 2V and 4V and internal resistance 1Omega and 2Omega r...

    Text Solution

    |

  9. Which two resistors are connected in series with a cell of emf 2V and ...

    Text Solution

    |

  10. Two resistors of resistances 2Omega and 4Omega are connected in parall...

    Text Solution

    |

  11. Three equal resistors connected in series across a source of emf of ne...

    Text Solution

    |

  12. A copper wire has 3xx 10^(22) free electrons in 0.021 m length. The dr...

    Text Solution

    |

  13. A copper wire has 3xx 10^(22) free electrons in 0.021 m length. The dr...

    Text Solution

    |

  14. A cube of side 0.05 m of a material of conductor is drawn into a wire ...

    Text Solution

    |

  15. If the number density of electrons in a conductor is 3 xx10^(28) and t...

    Text Solution

    |

  16. Two resistors 10Omega and 25Omega are connected in series and the comb...

    Text Solution

    |

  17. Four resistors of resistances 2Omega, 1Omega, 3Omega, 4Omega are arran...

    Text Solution

    |

  18. ABCD forms the four arms of a Wheatstone's network. The arms AB, BC, C...

    Text Solution

    |

  19. A battery of emf 10V and internal resistance 3Omega is connected to a ...

    Text Solution

    |

  20. Three resistors 2Omega, 4Omega and 5Omega are connected in parallel. W...

    Text Solution

    |

  21. Three resistors 2Omega, 4Omega and 5Omega are connected in parallel.If...

    Text Solution

    |