Soft iron is used as the core of an electromagnet. It increases the strength of the magnet.
Iron - use a bunch of iron nails, wrapped many times with insulated copper wire, if making your own electromagnet.
no...only magnetic materials can be used as electromagnet...zinc is not a magnetic material
True
True
Aluminium is not a magnetic metal.
I cannot remember for sure, but in an electromagnet, an aluminum core would not have any permeability to add to the electromagnet's strength. An electromagnet is more efficient when a thicker core is used; it generates more power. The material you use should be prone to magnetism, as in attracted by permanent magnetic apparatuses or the such. So, an aluminum bar/core (cannot be magnetized), like you stated, wouldn't be the best choice for your magnet's core.
EXAMPLES OF AN ELECTROMAGNET ARE CARS, GENARATORS
electromagnetically
using a stronger ferromagnetic material for the core. :)
yes it does
No.