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A cell supplies a current of 2A to an ex...

A cell supplies a current of 2A to an exertnal resistance of `2Omega ` and a current of 1 ampere to another external resistance of `4.5 Omega ` connected across the cell separately . Select the correct alternative (s).

A

Emf of the cell is 5 V

B

Emf of the cell is 4.25 V

C

Internal resistance of the cell is 0.5`Omega`

D

Internal resistace of the cell is `3.25 Omega `

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Knowledge Check

  • 24 cells of emf 1.5 V each having internal resistance of 1 Omega are connected to an external resistance of 1.5Omega . To get maximum current,

    A
    all cells are connected in series combination
    B
    all cells are connected in parallel combination
    C
    4 cells in each row are connected in series and 6 such rows are connected in parallel
    D
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  • The internal resistance of a 2.1 V cell which gives a current of 0.2 A through a resistance of 10 Omega is .

    A
    `0.5Omega`
    B
    `0.8 Omega`
    C
    `1.0 Omega`
    D
    `0.2 Omega`

  • The internal resistance of a 2.1 V cell which gives a current 0.2 A through a resistance of 10 Omega

    A
    `0.2 Omega`
    B
    `0.5 Omega`
    C
    `0.8 Omega`
    D
    `1.0 Omega`

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