The Earth’s magnetic field is one-half gauss, and 10,000 gauss equal one Tesla. The room housing the magnet will be made of 290 tons of iron. “Large amounts of iron contain the magnetic field, so the ...

Magnetic strength in the magnets used in electric motors is measured in tesla (where 1 tesla = 10,000 Gauss, for those more familiar with the unit used to measure Earth’s magnetic pull).