Not really. Magnetism - just like electricity or gravitation - is a "conservative force", which basically means that if you get energy when something moves in one direction, then you NEED the same amount of energy to move it in the opposite direction. For example, it requires energy to lift an object (against the force of gravity); in theory you can recover this energy when the object falls back down.
The Earth's magnetic field is strongest at the North and South magnetic poles, which are not the same as the geographic North and South poles. The magnetic field strength varies at different locations on the Earth's surface.
In an AC machine, the electrical frequency of the input power supply determines the rotational speed of the magnetic field, which interacts with the conductors in the machine to produce electrical power. The relationship between electrical frequency and magnetic field speed is directly proportional – an increase in electrical frequency results in a corresponding increase in the speed of the rotating magnetic field.
Yes, Earth's magnetic field is weaker at the poles compared to the equator. This is because the magnetic field lines converge at the poles, making the field strength weaker in those regions.
Yes, a compass works by aligning itself with the Earth's magnetic field to determine direction. The needle in a compass is magnetized and will point towards the Earth's magnetic north pole.
The strength of a magnetic field is typically measured in units of Tesla (T) or Gauss (G). For example, the Earth's magnetic field is around 25 to 65 microteslas. In comparison, an MRI machine produces a magnetic field of around 1.5 to 7 Tesla.
Volcanoes
Yes.
It is made by the movement of the earths core and magma field
The earths magnetic field results from deep in the earths core. Magnetic conduction from within the earths core is believed to be the cause of this.
because it has the hydro electric power to control the earths magnetic field
It is Earths' "Magnetosphere".
earths magnetic field is generated by the circulation of liquid metal.
It is Earths' "Magnetosphere".
= An effect of the magnetic field is "Van Allen radiation belt" =
The Earth's Magnetic field.
Earth's magnetic field is strongest at the magnetic North Pole and the magnetic South Pole.
The strength of Earth's magnetic field is strongest at the magnetic poles, which are not necessarily aligned with the geographic poles. The magnetic field is weakest at the magnetic equator.