试题与答案

The vertical component of the Earth’s magn

题型:单项选择题

题目:

The vertical component of the Earth’s magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation? ()

A.The Flinders bar

B.The heeling magnet

C.Quadrantal soft iron spheres

D.Bar magnets in the binnacle

答案:

参考答案:A

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