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What is the list for the characteristics of a magnetic field produced by a current?
A magnetic field is a change in energy within a volume of space. A magnetograph can be created by placing a piece of paper over a magnet and sprinkling the paper with iron filings. The particles align themselves with the lines of magnetic force produced by the magnet. The magnetic lines of force show where the magnetic field exits the material at one pole and reenters the material at another pole along the length of the magnet. It should be noted that the magnetic lines of force exist in three dimensions but are only seen in two dimensions in the image.
Would it be good to visit a planet with a magnetic field?
We are already on a planet with a magnetic field and yes magnetic fields are what protect the planet from various dangers. Not to mention nearly every planet we have seen has a magnetic field (save venus). It is believed that the magnetic fields of planets save them from solar winds which would otherwise slowly strip the atmospheres of planets by taking out chunks of atoms every time they hit. Mars has an extremely weak (or none according to many scientists) magnetic field and as such the solar winds bash into it and scoop out ions from the planet. Overall conclusion: Yes, you want to visit a planet with a strong magnetic field, it's basically more protection (in theory at least).
How can you tell if a piece of iron is magnetized or neutral?
If the piece of metal is a magnet it will attract another piece of iron. You should be able to feel this attraction as the two become very close. It's magnetic field can be "seen"( that is the effect) by placing iron filings on a piece of glass and place the magnet beneath the glass. Otherwise it is not a magnet.
What is megnetism caused by?
Magnetism is caused by electric currents that travel opposite of each other. That is a physics concept. Magnetism as a whole and in general exists only because the Earth has a magnetic field surrounding it. The reason for this is likely interrelated with gravity and mass, but we do know that the strength of the Earth's magnetic field is currently declining. What this means for magnets remains to be seen.
What is nature of magnetism?
Magnetism is still a big mystery. This is due to the fact that the source of it cannot be found, the magnetic monopoles. It can be theorized that magnetism is the key to understanding the concept of perpetual motion. It seems that the magnetic field is always in motion. This motion is nonstoppable. It detection can be seen by the presence of charged particles in the field. But how fast is the field moving can only be guessed. The strength of the field is determined by the radius of spiral of the charged particles moving along the field lines of force. If the speed of the field is directly proportional to the speed of the field, then when the radius of the spiral is almost zero, the field is moving at near maximum speed. Is this the speed of light?
What is the invisible force around a magnet called?
Have you ever seen a magnet? Did you see the field? There you go. While you can't see the field itself directly, you can see the effects of the field if you use iron filings or something like that; they'll line up with the magnetic field lines
What describes the production of an electric current by moving a loop of wire through a magnetic field or moving a magnet through a wire loop?
moving a loop of wire through a magnetic Field. The rotation of a coil of copper wire trough a magnetic field changes magnetic field as "seen" from the coil inducing an alternating current.
How were the reversals of the Earth's magnetic field discovered?
The reversals were seen by archeologists in ancient pottery shards.
Why are auroras more commonly seen in Alaska then in Mexico?
Because both Alaska and Australia are much closer to the poles, where the effects of Earth's magnetic field can be seen -- auroras occur due to solar winds hitting the lower layers of the magnetic field.
Why does the compass rose point north?
it doesn't, it points to Magnetic North which is somewhere in the north of Canada. A compass may point 20 degrees or more different from geographic north. The North pole of a magnet will point to magnetic north. The next question is why is the Earth magnetic, and why does it have a south pole magnetic near the North pole. I haven't seen a really good explanation. Something to do with the centre of the Earth having a layer of liquid iron that is rotating, and moving conductors generating a magnetic field. The Earth's magnetic pole has flipped over in the past and gone walkabout, as evidenced by magnetic records in rocks which solidified at different times.
What is the list for the characteristics of a magnetic field produced by a current?
A magnetic field is a change in energy within a volume of space. A magnetograph can be created by placing a piece of paper over a magnet and sprinkling the paper with iron filings. The particles align themselves with the lines of magnetic force produced by the magnet. The magnetic lines of force show where the magnetic field exits the material at one pole and reenters the material at another pole along the length of the magnet. It should be noted that the magnetic lines of force exist in three dimensions but are only seen in two dimensions in the image.
Would it be good to visit a planet with a magnetic field?
We are already on a planet with a magnetic field and yes magnetic fields are what protect the planet from various dangers. Not to mention nearly every planet we have seen has a magnetic field (save venus). It is believed that the magnetic fields of planets save them from solar winds which would otherwise slowly strip the atmospheres of planets by taking out chunks of atoms every time they hit. Mars has an extremely weak (or none according to many scientists) magnetic field and as such the solar winds bash into it and scoop out ions from the planet. Overall conclusion: Yes, you want to visit a planet with a strong magnetic field, it's basically more protection (in theory at least).
Why is the zebra like pattern seen in the magnetic signature of mid Atlantic ridges?
The pattern is caused by the magnetic alignment of certain iron minerals in solidifying magma with Earth's magnetic field at the time of the magma's solidification. Earth's magnetic field has not been static over geologic time, and its shifts are recorded in the igneous rock produced at the Mid-Atlantic ridge.
What are the condition that must be present to induce an emf in a conductor?
A changing magnetic field will cause an emf in a conductor in the area perpendicular to the field. Though this effect is often seen when the conductor is shaped in a closed wire loop with the magnetic field passing through the loop.
How can you tell if a piece of iron is magnetized or neutral?
If the piece of metal is a magnet it will attract another piece of iron. You should be able to feel this attraction as the two become very close. It's magnetic field can be "seen"( that is the effect) by placing iron filings on a piece of glass and place the magnet beneath the glass. Otherwise it is not a magnet.
Is the magnetic field of earth stronger in Mexico or in the bottom of the earth in antarctica?
It is stronger in Mexico. The main proof of such statement is the aurora borealis, which can be seen only on the Earth's poles.
Why is earth the largest magnet?
Well, first off the magnetic fields on the Sun, seen as plasma loops, are enormous compared to the size of the Earth - perhaps millions of km in altitude from the Sun's surface. These are the largest 'local' magnetic fields, both in size and strength.Bringing our feet back to the ground and considering the magnetic field of the Earth, this is probably caused by thermal effects in the outer core of the Earth generating electric currents, which in turn generate a magnetic field. The interior of the Earth is much too hot (about 6000K) to sustain any magnetic material. (see Curie effect). The field we see is the net field resulting no doubt from many disparate contributions, and which do vary in strength and location.
