A coil consisting of 50 turns of wire is powered by a 9V battery. If the coil draws 1.5 A from the battery, what is the MMF, in ampere-turns

Question

A coil consisting of 50 turns of wire is powered by a 9V battery. If the coil draws 1.5 A from the battery, what is the MMF, in ampere-turns ?
A. 75 ampere-turns
B. 300 ampere-turns
C. 59 ampere-turns
D. 450 ampere-turns

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Khải Quang 3 years 2021-08-07T08:37:18+00:00 1 Answers 29 views 0

Answers ( )

  1. haidang
    0
    2021-08-07T08:38:19+00:00
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    A. 75 ampere-turns

    Explanation:

    Given:

    Number of turns, n = 50

    Voltage, V = 9V

    Current, I = 1.5A

    MMF= ?

    MMF is magnetomotive force.

    MMF is independent on voltage and dependent on the number of turns and current in the wire.

    Thus, MMF can be written as:

    MMF = nI

    On substituting the value we get:

    MMF = 50 X 1.5

    MMF = 75 ampere-turns

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