Is there a thin material that magnetic force will not penetrate?
Unplug everything on that circuit. Try the breaker again. If it stays up, the problem is in one of the things that you unplugged. Plug them back in one at a time. If/When the breaker trips you have found the faulty device. If the breaker trips with everything on that circuit unplugged then I hope that it is the breaker they cost about $20 get a good one. If the new breaker trips the problem is in the house wiring. (more $$). One of the outlets , light fixture , etc. I dont know where you live but some states allow you to take the cost of repairs out of the next rent payment. Notify the landlord in writing!! of the problem , If they dont send an electrician, call the electrician yourself. IT IS A POTENTIALLY DANGEROUS SITUATION.
The grey box mounted on your house next to your AC unit. Make sure to flip breaker all the way off and then on. Good Luck
Yes. There is a particular alloy called mu-metal which almost completely excludes magnetic fields; it used to be used for shielding vacuum tubes (particularly CRT's) where external fields would cause problems. For complete exclusion, you can use a superconductor; these totally exclude a magnetic field by having a current in the surface creating a field counter to the external field.
Theoretically, at least, a superconductor will exclude any external magnetic fields from it's interior. This is due to the fact that if a magnet is moved near the superconducting material, the changing magnetic field will induce eddy currents that *oppose* this field. This is known as the Meissner Effect hyperphysics.phy-astr.gsu.edu/hba. Since these currents can flow without resistance, they will remain flowing, as long as the magnet remains near the superconductor, and will change, exactly in proportion to any changes in the field. In a normal conductor, electrical resistance eventually brings these eddy currents to a halt, hence normal conductors merely resist *changes* in external magnetic fields, they don't *exclude* the fields altogether. (Note on geometry: magnetic field lines are always *closed loops.* Lines of field don't *disappear,* or *end* at the surface of the superconductor, or any object, they simply bend around it.) WOMBAT
a neodymium rare earth magnet
