[理工] 電磁學

[ISnathan (吼~我是努力的艾斯洨天使)]

The field B = -2ax + 3ay + 4az mT is presented in free space. Find the vector
force exerted on a straight wire carrying 12A in the aAB direction, given
A(1,1,1) and B(2,1,1).

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