does earth has a megnatic field and if so how????????
Don't worry you're not as embarrassed as physics.i m definatly missing something here
Don't worry you're not as embarrassed as physics.
The Earth's magnetic field is amazingly poorly understood even today, which is why we get away with handwaving explanations of the 'dynamo effect'.
There are possible explanations from second order effects of a moving conductive (but overall uncharged) fluid moving in a field - a little like how the corriolis effect is a second-order effect of a rotating earth.
electric field due to spin WOW that is some question
my guess is that the earth spin with a CONSTANT anguler velocity (no accelaration ) if the earth were accelarating our days would be shortened with time!!
but thats my personasl opinion could be wrong
even with CONSTANT angular velocity don't you get acceleration. towards the centre maybe? and then an electric field would be created magically causing a magnetic field to form perpendicular to a vector towards the centre of the earth, thereby pointing maybe to a north and south pole? . just speculating.
Well average acceleration is 0, but so is the average electric field. At any given moment there would be a changing electric field, which induces a magnetic field perpendicularly to that. I doubt I would provide you a fulfilling explanation. They do spin magnets in many devices though, try googling that.
so the in that case megnatic field will also be zero (overall) but we will get some instantaneuos values right
is that what you are trying too say ?
but in that case the megnatic field it self would not be non uniform and an non uniform megnatic field will show non uniform effects which is not the case (if i m not wrong)
Important ones are:
Compass needles point north.