Coil with 1 Ω resistance.I want to assemble circuit to power coil and control amount of current flow with MOSFET.But before that I'd like to know. What does affect on electromagnet field ?Current or power ?For example:If Current flow, then 1 A and 1 V, would be the same as 1A and 10 V.If Power, then 1 A and 5 V would be the same as 0.25 A and 20 V.

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Coil with   1  Ω resistance.I want to assemble circuit to power coil and control amount of current flow with MOSFET.But before that I&#039;d like to know. What does affect on electromagnet field ?Current or power ?For example:If Current flow, then   1  A and   1  V, would be the same as 1A and   10  V.If Power, then   1  A and   5  V would be the same as   0.25  A and   20  V.

garbhaighzf · Accepted Answer

It is actually current and the number of times that current loops around. The number of loop essentially lets the magnetic field of that same current stack up on itself.It is impractical to have one loop with 1000A running through it, but it is much more practical to have 10A running through 100 loops so that the magnetic field generated by that current is stacked 100 times to get the same result.Of course, more loops means more wire which means more resistance which means more voltage to push the same current which means more power, because nothing is free...although there are superconducting coils...I don&#039;t really understand how that works power-wise. I assume it has something to do with the field performing work vs no work, and a regular magnet always has some work being done due to resistance even if the magnetic field is performing no work.

Coil with 1 Omega resistance. I want to assemble circuit to power coil and control amount of current flow with MOSFET. But before that I'd like to know. What does affect on electromagnet field ?

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