The permanent magnetism of a vessel may...

Question 1 / 2707066636ee928f7522a1c519e19

Question 1 of 2707066636ee928f7522a1c519e19

The permanent magnetism of a vessel may change in polarity due to __________.

Question 1 of 27070

The permanent magnetism of a vessel may change in polarity due to __________.

🔍 Key Concepts

• Difference between permanent magnetism and induced magnetism in a steel hull • How Earth’s magnetic field and strong electrical currents can affect a ship’s magnetic polarity • Which influences mainly change strength of magnetism versus polarity (direction of magnetization)

💭 Think About

• Ask yourself: which option involves a very strong, short‑duration magnetic/electric effect that can actually flip the direction of magnetization in the ship’s steel? • Which options mainly cause slow, gradual alignment of induced magnetism with the Earth’s field, without normally reversing the basic permanent polarity? • Consider which choice is about the ship’s own steel becoming magnetized differently, and which are more about adding or rearranging nearby magnetic material.

✅ Before You Answer

• Identify which answers relate to permanent magnetism of the hull itself versus induced/local magnetism from cargo or heading. • For each option, decide: does this mostly change magnitude of magnetism, or can it realistically reverse the polarity (north/south direction) of the ship’s permanent magnetism? • Think about real‑world events known to re‑magnetize or de‑magnetize steel, such as heavy shocks, strong currents, or intentional degaussing.

Question 1 of 27070

The permanent magnetism of a vessel may change in polarity due to __________.

being struck by lighting

steaming from the north magnetic hemisphere to the south magnetic hemisphere

being moored for a long time on one heading

loading a homogenous magnetic cargo such as steel plate, iron bars, etc.

Question 1 / 2707066636ee928f7522a1c519e19

Question 1 of 2707066636ee928f7522a1c519e19

The permanent magnetism of a vessel may change in polarity due to __________.

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Question 1 of 27070

The permanent magnetism of a vessel may change in polarity due to __________.