Question 1

What is a tesla?

Accepted Answer

A tesla (T) is the SI unit of magnetic flux density. 1 T = 1 Wb/m² = 10,000 gauss.

Question 2

How strong is the Earth's magnetic field?

Accepted Answer

The Earth's magnetic field is approximately 25–65 μT (0.25–0.65 gauss) depending on location.

Question 3

What magnetic fields do common devices produce?

Accepted Answer

Refrigerator magnets: about 5 mT. Neodymium magnets: 0.2–1.4 T. MRI machines: 1.5–7 T. Strongest lab magnets: over 45 T.

Question 4

What is the difference between tesla and gauss?

Accepted Answer

1 tesla = 10,000 gauss. Tesla is the SI unit, while gauss belongs to the CGS system. Tesla is used in engineering and physics; gauss is still common in geophysics and everyday magnets.

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