eli5 Why Earth magnetic field doesnot affect electric appliances especially at poles where field is greatest
In: 1
It does, it’s just a very small effect overall, so small that it can be ignored in most applications. The earth’s magnetic field is huge, but it isn’t overall very strong. A simple fridge magnet is much stronger (though of course much smaller).
It does, it’s just a very small effect overall, so small that it can be ignored in most applications. The earth’s magnetic field is huge, but it isn’t overall very strong. A simple fridge magnet is much stronger (though of course much smaller).
its weak and its static.
magnetic fields mostly affect electronics only when changing, which the earth’s field mostly doesnt.
and even when changing, its weak (on human/electronics scales) to begin with, so it cant do much either way.
Think how much pull a tiny neodymium magnet has, get a pair of those much bigger than a pair of coins, and they can cause mild pinch injuries if you get in the way of them when they want to come together.
Meanwhile the Earth’s magnetic field is so slight that you need a very carefully balanced and very light needle in a sealed environment so it doesn’t get affected by other influences, and can show the effect the Earth’s magnetic field has on it.
TL:DR; Its effect is very very tiny.
Magnetic fields doesn’t really affect most electric devices very much.
*Changes* in an electric field is what affects electric devices since a sudden change in the magnetic field can make electrons start to move around inside the electric device.
The earths magnetic field isn’t changing much at all, that’s why we can use it to navigate, so it doesn’t bother electric stuff much.
its weak and its static.
magnetic fields mostly affect electronics only when changing, which the earth’s field mostly doesnt.
and even when changing, its weak (on human/electronics scales) to begin with, so it cant do much either way.
Think how much pull a tiny neodymium magnet has, get a pair of those much bigger than a pair of coins, and they can cause mild pinch injuries if you get in the way of them when they want to come together.
Meanwhile the Earth’s magnetic field is so slight that you need a very carefully balanced and very light needle in a sealed environment so it doesn’t get affected by other influences, and can show the effect the Earth’s magnetic field has on it.
TL:DR; Its effect is very very tiny.
Magnetic fields doesn’t really affect most electric devices very much.
*Changes* in an electric field is what affects electric devices since a sudden change in the magnetic field can make electrons start to move around inside the electric device.
The earths magnetic field isn’t changing much at all, that’s why we can use it to navigate, so it doesn’t bother electric stuff much.
Depending where you are the earth’s magnetic field is around 50 micro teslas.
A tesla being a unit of how magnetic something is.
Your average fridge magnet clocks in at around **5,000** micro teslas.
And a lot computer stuff uses magnets in the million of micro teslas.
So all of it is much much stronger than the earth’s magnetic field.
Depending where you are the earth’s magnetic field is around 50 micro teslas.
A tesla being a unit of how magnetic something is.
Your average fridge magnet clocks in at around **5,000** micro teslas.
And a lot computer stuff uses magnets in the million of micro teslas.
So all of it is much much stronger than the earth’s magnetic field.
Latest Answers