UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
Everyone says magnetic fields pass through wood. I'm curious if wood causes magnetic fields to weaken, bend, or resist the source of the field in any way. For example, if a current through a wire generates a field, and that wire is placed on wood as opposed to being suspended mid air, does the surface cause the field to change its shape, slow down, or otherwise cause an opposing force that could impact the flow of electrons that cause the field in the first place?
Question Date: 2020-07-03
Answer 1:

Magnetic static fields can pass through Faraday cages. Changing magnetic fields - and the electric fields that they generate - do not, because they induce currents in the Faraday cages.

Wood, being not an electrical conductor, isn't going to do much of anything to a magnetic field, however, although wood waterlogged with seawater will act like a Faraday cage, since seawater conducts electricity. However, dry wood would have very little effect on the magnetic field and yes, you could levitate it if there were current flowing through it.

Answer 2:

I agree with everyone. I did an experiment with a magnet, a paper clip, and a toothpick. With the magnet and the paper clip lying on a table, the magnet could pull the paper clip when they were about the width of the toothpick apart. When I put the toothpick between the magnet and the paper clip, the magnet could still pull the paper clip.

Here are more answers. "Materials that are not attracted to a magnet like air, wood, plastic, brass, etc., have a permeability of, essentially, 1. There is no magnetism induced in them by an external magnetic field, and therefore, they are not attracted by a magnet."

Here you have another answer for your question from ScienceLine.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use