It will pick up the nails the same way a bar magnet would do!
To separate Nails from flour you would get a magnet and put the magent above the bowl of nails and flour. The nails will then be attracted to the magnet and then you will have the nails separated from the flour.
Yes electromagnet would be attracted to a magnet provided direct current flows through the coil ie when the electromagnet is activated. As unlike poles attract each other the magnet is to placed accordingly. Otherwise repulsion would take place.
With a magnet.
No, as in this case,the rod is the magnet,and the strength of a magnet does not depend on its size.
An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current ceases. Take a look at this Wikipedia page for more information: http://en.wikipedia.org/wiki/Electromagnet
the arrow in the compass would point to the magnet
Yes A magnet would help you separate a mixture of iron nails and iron screws because the magnet when you wave it over the iron nails it will pick them up and then you just wipe them off the magnet with a paper towel and then your iron screws are separated Answer: NO!!!! The magnet would pick up nails and screws equally if they were both made of iron and were the same weight. A magnet would pick up something lighter more easily, but unless all of your nails were one weight and all of your nails were another weight, the magnet would not be able to separate them.
The core of an electromagnet should not be made from steel because steel can retain magnetism and decrease the efficiency of the electromagnet by causing residual magnetism. Instead, materials like soft iron or iron alloys are preferred for electromagnet cores as they can be easily magnetized and demagnetized.
sometimes in magnetic sepration etc electromagnets are more useful than permanent one as first magnet is used to seprate metallic waste and then its turned off so that attracted waste falls off at desired place so here permanent magnets are not that use full as electromagnet as in permanent magnet waste would get attracted but it would not fall. so electromagnet is more useful than permanent one.
You would want to use an electromagnet when you need the magnetic field to be controlled and easily turned on and off, such as in industrial applications like material handling or scrap metal sorting. Electromagnets are versatile as the strength of the magnetic field can be adjusted by changing the electric current flowing through the coil.
A magnet will not pick up aluminum nails because aluminum is not magnetic. You would need to use a vacuum or a broom to pick up aluminum nails.
Electromagnet is the magnet which is becoming active so long current through the coil flows. If current stops then the magnetism disappears. If a core made up of soft iron is used then magnetism will become more intense but the magnetism exists so long the current flows. Any way electromagnet will behave just like a permanent bar magnet. So electromagnet would set itself along the earth's magnetic meridian.