Home
Class 12
PHYSICS
Why is the terminal voltage of a cell le...

Why is the terminal voltage of a cell less than its emf?

Text Solution

Verified by Experts

The emt of a cell is the energy supplied for flow of unit charge once round the entire electrical circuit whereas terminal voltage is energy supplied for flow of unit charge once across the external resistance only. As a result emf `(epsi)` of a cell is greater than its terminal voltage (V).
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise SHORT ANSWER QUESTIONS|42 Videos

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise LONG ANSWER QUESTIONS - I|47 Videos

  • CURRENT ELECTRICITY

    U-LIKE SERIES|Exercise ASSERTION-REASON TYPE QUESTIONS|5 Videos

  • CBSE SAMPLE QUESTION PAPER 2019-20 (SOLVED)

    U-LIKE SERIES|Exercise SECTION D|6 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    U-LIKE SERIES|Exercise SELF ASSESSMENT TEST SECTION-C (VERY SHORT ANSWER QUESTIONS)|3 Videos

Similar Questions

Explore conceptually related problems

The terminal voltage of a cell is greater than its emf, when it is

The terminal voltage across a cell is more than its emf if an another cell of:-

The terminal voltage of a cell is greater tha its emf. When it is

The terminal Pd of a cell is equal to its emf if

Assertion: Terminal voltage of a cell is greater than emf of cell during charging of the cell. Reason: The emf of a cell is always greater than its terminal voltate.

What is terminal potential differnce of a cell? Can its value be greater than the emf of a cell? Explian.

A cell of emf 2V produces 0.3A current when connected to a resistor of 5Omega . Calculate the terminal voltage and internal resistance of the cell.

U-LIKE SERIES-CURRENT ELECTRICITY -VERY SHORT ANSWER QUESTIONS
  1. Is electric current a scalar or a vector ? Why?

    Text Solution

    |

  2. Why is the terminal voltage of a cell less than its emf?

    Text Solution

    |

  3. What is the difference between terminal voltage and emf of a cell ?

    Text Solution

    |

  4. A wire of resistivity rho is stretched to twice its length. What will ...

    Text Solution

    |

  5. electrical conductivity, has the SI unit "ohm-metre”. Identify the phy...

    Text Solution

    |

  6. Define electrical conductivity of a metallic wire. Write its SI unit.

    Text Solution

    |

  7. Show variation of resistivity of copper as a function of temperature i...

    Text Solution

    |

  8. Show on a graph the variation of resistivity with temperature for a ty...

    Text Solution

    |

  9. A wire of resistance 8R is bent in the form of a circle. What is the e...

    Text Solution

    |

  10. Define the term 'drift velocity' of charge carriers in a conductor and...

    Text Solution

    |

  11. Write the expression for the drift velocity of charge carriers in a co...

    Text Solution

    |

  12. How does drift velocity of electrons in a metallic conductor vary with...

    Text Solution

    |

  13. A conductor of length L is connected across d.c. source of emf epsi . ...

    Text Solution

    |

  14. Two conducting wires X and Y of same diameter but different materials ...

    Text Solution

    |

  15. I-V graph for a given metallic wire at two temperatures T1 and T2 is a...

    Text Solution

    |

  16. Two wires of equal length, one of copper and the other of manganin hav...

    Text Solution

    |

  17. Nichrome and copper wires of same length and same radius are connected...

    Text Solution

    |

  18. Write an expression for the resistivity of a metallic conductor showin...

    Text Solution

    |

  19. Why are alloys, manganin and constantan used to make standard resistan...

    Text Solution

    |

  20. When electrons drift in a metal from lower to higher potential, does i...

    Text Solution

    |