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26 November, 03:55

Wire A carries 4 A into a junction, wire B carries 5 A into the same junction, and another wire is connected to the junction. What is the current in this last wire?

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  1. 26 November, 07:42
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    Answer:9A

    Explanation:

    let the last wire be wire C

    According to Kirchhoff's rule

    the sum of all currents entering a junction must be equal to the sum of all currents leaving a junction

    Ic=Ia+Ib

    Ic = 4+5

    Ic=9A
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