Questions about magnetism and its uses in devices

[grade11]

I just have some questions about this stuff...

How can the nature of a material determine if it can be made into a magnet?

Whats the field around a straight conducter look like?

Whats the direction of the magnetic field of a soleniod?

Whats the action of a relay?

How are the principles of magnetism related to the development of the telephone?

 

[mgb_phys]

You can't just post questions verbatim in the homework thread - we are here to help and explain not just to copy out answers.
Especially when you were told about this yesterday and have simply reposted the same questions as a new thread.
Irrespective of the official sanctions about this, people will simply start ignoring any threads by you.

I suggest you look at wikipedia first then come back and ask about any specific points you don't understand.

 

[grade11]

Whoa calm it down, seroiusly wat is your problem? I am asking the question because i do not understand the answers? and i thought the thing from yesterday was telling me that my questions didnt make sense and i had to reword them, like you can either help or not but don't run me down on what i feel i need help on. thanks.!