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After long use of car, as given in quest...

After long use of car, as given in question 33, the internal resistance of the storage battery increases to `500 Omega`. What maximum current can be drawn from the battery ? Assume the emf of the battery to remain unchanged.

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The maximum current can be drawn from a battery by short circuiting it. Then V = 0 and `I_(max)=epsilon//r =12//500=2.4xx10^(-2)A= 24 mA` Now, the battery must be recharged before use.
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Knowledge Check

  • The battery of a trunk has an emf of 24 V. If the internal resistance of the battery is 0.8Omega . What is the maximum current that can be drawn from the battery?

    A
    30A
    B
    32A
    C
    33A
    D
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  • For maximum power from battery the internal resistance of battery r is

    A
    `10 R`
    B
    `(4R)/(9)`
    C
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    D
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  • In the circuit shown, if the 10 Omega resistance is replaced by 20 Omega then what is the amount of current drawn from the battery ?

    A
    `10 A `
    B
    `4 A `
    C
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    D
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