10 ms·
>The EM field is always there Did you mean to say "the E field is always there"? Loved this explanation otherwise.
by programmer_dude 3y ago
>The EM field is always there
Did you mean to say "the E field is always there"?
Loved this explanation otherwise.
- computerfriend 3y agoIt's one field, which can be split into E and B components if you like.
- georgeg23 3y agoThe B field is just the E field's relativistic effects to an observer not in the same motion frame. https://wikipedia.org/wiki/Classical_electromagnetism_and_special_relativity https://wikipedia.org/wiki/Classical_electromagnetism_and_sp...
- H8crilA 3y agoBoth are always there if the circuit is running. Also, both E and M fields are required to transport any power using electricity. This is also true for DC current. See https://en.wikipedia.org/wiki/Poynting_vector https://en.wikipedia.org/wiki/Poynting_vector - the formula multiplies E by B, therefore if any of the two is zero no power (or information) transmission can occur. This is true over the air, as well as over a wire.