A Semi-Infinite Wire Runs Along the Positive Y Axis, Beginning

question 7

Multiple Choice

A semi-infinite wire runs along the positive y axis, beginning at the origin (x = y = 0) and extending infinitely far in the +y direction.If the current in the wire is 12 A, what magnetic field does it create on the x axis at the point x = 3.5 cm?

• A)0 T
• B)3.4 x 10^-5 T
• C)6.9 x 10^-5 T
• D)1.4 x 10^-4 T
• E)4.3 x 10^-4 T

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Definitions:

Homoplasious Trait

A characteristic shared by a set of species but not present in their common ancestor, often resulting from convergent evolution rather than shared ancestry.

Analogous Trait

A trait shared by different species due to convergent evolution, not because of a shared ancestry, producing similar structures independently.

Monophyletic Group

A group of organisms that consists of all the descendants of a common ancestor, representing a single branch on the tree of life.

Ancestor

An organism from which others have descended.