Home
Class 12
PHYSICS
The potential difference across terminal...

The potential difference across terminals of a battry is `9.0 V`, when a current of `3.5A` flows through it from its negative terminal to the positive terminal .When a current of `2A` flows through in the opposite direction, the terminal potential difference is `12V`. Find the internal resistance and emf of the battery

Text Solution

Verified by Experts

The correct Answer is:
`2 Omega, 16 V`
When current flow through the battery from its the negative to positive terminal (i.e , current is draw from battery ) then
`V = epsilon - 1 r or 9.0 = epsilon - 3.5 r `…..(i) When current flow through the battrey from its the positive negative to terminal (i.e , battery is charged) then
`V = epsilon 1 r or 12 = epsilon - 2 r `…..(ii)
On solving (i) and (ii) we get
`r = 2 Omega and epsilon = 16 V`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Jee (main and advance)|4 Videos

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Interger Type|2 Videos

  • CURRENT ELECTRICITY

    PRADEEP|Exercise Value based|2 Videos

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    PRADEEP|Exercise Exercise|191 Videos

Similar Questions

Explore conceptually related problems

The potential difference across the terminals of a battery is 8.4 V when there is a current of 1.50 A in the battery from the negative to the positive terminal. When the current is 3.50 Air , the reverse direction, the potential difference becomes 9.4 V . (a) What is the internal resistance of the battery? (b) What is the emf of the battery?

Potential difference across the terminals of a cell is always less than its emf.

Knowledge Check

  • The potential difference across te terminals of a battery is 10 V when there is a current of 3 A in the battery from the negative to the positive terminal. When the current is 2A in the reverse direction, the potential difference becomes 15 V. The internal resistance of the battery is

    A
    `1Omega`
    B
    `0.4Omega`
    C
    `0.6Omega`
    D
    `0.8Omega`

  • The potential difference across the terminals of a battery is 50 V when 11 A current is drawn and 60 V, when 1A current is drawn . The emf the battery is

    A
    62 V
    B
    63 V
    C
    61 V
    D
    64 V

  • When a current of 2 A flows in a battery from negative to positive terminal, the potential difference across it is 12 V. If a current of 3 A flowing in the opposite direction produces a potential difference of 15 V, the emf of the battery is

    A
    `12.6V`
    B
    `13.2V`
    C
    `13.5V`
    D
    `14.0V`

    • Similar Questions

    Explore conceptually related problems

    Within the cell, conventional current flows from its negative to the positive terminal .

    Potential difference across the terminal of alpha battery drops by 1 V when alpha current of 1 A is drawn from its positive terminal by connecting it to alpha circuit . What is the internal resistacne of the battery ?

    According to this diagram , the potential difference across the terminals is ( internal resistance of cell =r)

    When a current of 2 A flows in a battery from negative to positive terminal, the potential difference across it is 20 V. If a current of 3 A flowing in the opposite direction produces a potential difference of 25 V, the emf of the battery is

    The terminal potential difference of a cell is greater than its emf when it is

    Home
    Profile