A wire delivers 120 C of charge in 40 s. What is the current in the wire? 30A 80A 16A 48A

Question

A wire delivers 120 C of charge in 40 s.
What is the current in the wire?
30A
80A
16A
48A

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Bình An 3 years 2021-08-08T15:00:36+00:00 1 Answers 1 views 0

Answers ( )

  1. kimchi2
    0
    2021-08-08T15:02:05+00:00
    Reply

    Answer:

    3 A

    Explanation:

    Charge is a product of current and time, expressed as Q=It where Q is charge in Coulombs, I is current in Amperes and t is time taken in seconds. Making I the subject of the formula then I=\frac {Q}{t}

    Substituting 120 C for charge and 40 s for t thenI=\frac {120}{40}=3\ A

    From the choices given, it appears that time should have been 4 s to get option A or alternatively charge should have been 1200 C

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