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Magnetism is the act of magnets pulling objects. One example is holding a magnet up to paper clips. That is magnetism.
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∙ 13y ago
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How do electricity and magentism act on different objects?
It can either push or pull people.
How does outer space travel work?
outer space travel work by gravity and friction plus magentism
What wouold a permanently magnetic substance called?
No magnet is permanently magnetised. If it is dropped from a great height enough times or heated, it loses it's magentism.
What is the space in which magnet can act?
Magnetism is important in space in that space is filled with charged bodies that are moved by the magnetism. An example is, the Earth Magnetic shield deflects charged particles and protects the earth's atmosphere.
Can magnetism kill someone?
We all live in a relatively strong magnetic field every day, the Earth's therefore a moderate amount of magentism cannot even be felt. Strong magnets are used in MRI scanners which, again have no noticable effect on our body.
What is mechanical philosophy?
A model of the universe in which everything operates as the gears in a clock would, with one moving object directly affecting the motion of another object. It opposed other theories at the time, such as Kepler's idea that magentism was the cause of the motion of the planets, or Newton's theory on universal gravitation, because it rejects invisible forces and instead demands that moving matter be influenced by other physical matter.
Can you explain why there is an armature voltage even then the field current is zero in case of separately-excited dc generator?
if this happened it will be due to residual magentism and as soon as this magentism vanishes no voltage will be available , what iam saying can be interpreted mathematically first the generated emf across the armature is given by E= k* flux* speed it is clear due to this equation the emf is directly prportional to the flux which means if the flux is reduced so does the emf and the revers is true, the reduction may be lead to zero flux value and thus the emf (zero field current) secondly this emf covers the terminal voltage and the drop in armature winding if other possiple drops are ignored as E= terminal voltage + armature drop in this equation as E drops down as a result of reducing the flux and which in turn because of reduction in the field current , then right hand components will also drop down until both get zero values , so theoreyically no voltage will be exist at generator terminals when the field current comes to zero value, so the persistance of voltage is due to the residual field and will not last long
A contour line that forms a closed loop and has small dashes pointing to the inside of the loop represents what?
Hysteresis loops tell about the magnetic properties of a material. E.g. wider loops indicate that the material is magnetically hard (i.e. it retains magnetisation even if the applied field is removed, permanent magnetics have much wider hysteresis loops)whereas thinner loops represent it to be soft (if the magnetic field is removed, the material doens't show any magentism). This is one advantage of hysteresis loops. further, such loops can identify the grain size of a material and much more. hope it answers your question.
