Question 1

What are all the magnetic units and how do they relate?

Accepted Answer

Flux density: tesla (SI) = 10,000 gauss (CGS). Field strength: A/m (SI) vs oersted (CGS), 1 Oe = 79.577 A/m. Flux: weber (SI) = 10^8 maxwell (CGS).

Question 2

Why are there so many magnetic unit systems?

Accepted Answer

CGS (gauss, oersted, maxwell) was dominant before SI adoption. Different fields standardized on different systems. Conversions exist but SI (tesla, A/m, weber) is now preferred.

Question 3

What's a typical magnetic field strength?

Accepted Answer

Earth's field: 25-65 microtesla. Fridge magnet: 5 millitesla. MRI machine: 1.5-3 tesla. Strongest lab magnets: 45+ tesla.

Question 4

Why do we have both Tesla and Gauss?

Accepted Answer

Tesla is the SI unit; Gauss is the older CGS unit. 1 Tesla = 10,000 Gauss. Both remain in use across different fields and regions.

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