While having a discussion, Technician A says that the longer a conductor is, the more resistance it has and the smaller its diameter, the le

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While having a discussion, Technician A says that the longer a conductor is, the more resistance it has and the smaller its diameter, the less resistance it has. Technician B says that the larger its diameter, the less resistance it has. Who is correct

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Kiệt Gia 3 years 2021-08-14T23:14:48+00:00 1 Answers 40 views 0

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  1. huyenthanh
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    2021-08-14T23:16:10+00:00
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    Answer:

    Technician B is correct by saying that the larger diameter (i.e the conductor’s diameter), the less resistance it has.

    Explanation:

    According to the law of electrical resistance, the resistance of a metallic conductor is proportional to the length of the conductor, but inversely proportional to the cross-sectional area of the conductor.

    R = p\frac{l}{A}

    where R is the resistance of the conductor.

    p is the intrinsic resistivity of the material with which the conductor is made.

    l is the length of the conductor.

    A is the cross-sectional area of the conductor.

    This law simply means that if we increase the length of a conductor, or reduce the area, the electrical resistance of the conductor will increase, and vice versa.

    Technician B is correct by saying that the larger diameter (i.e the conductor’s diameter), the less resistance it has.

    This is because the area of the conductor is proportional to the cross-sectional area. And the larger the cross-sectional area of a conductor, the lesser its resistance will be.

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