A 4.9 A current is set up in a circuit for 4.7 min by a rechargeable battery with a 12 V emf. By how much is the chemical energy of the batt

Question

A 4.9 A current is set up in a circuit for 4.7 min by a rechargeable battery with a 12 V emf. By how much is the chemical energy of the battery reduced

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Kim Cúc 4 years 2021-07-27T23:50:43+00:00 1 Answers 13 views 0

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  1. mocmien2
    0
    2021-07-27T23:51:50+00:00
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    Answer:

    E = 16581.6 J

    Explanation:

    Given that,

    Current, I = 4.9 A

    Time for which the current is set up, I = 4.7 min = 282 s

    The voltage of the battery, V = 12 V

    We need to find how much chemical energy of the battery reduced. Let It is E. We know that,

    E = P t

    Where

    P is power of battery, P = VI

    So,

    E=VIt

    Put all the values,

    E=12\times 4.9\times 282\\E=16581.6\ J

    So, 16581.6 J of chemical energy of the battery is reduced.

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