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Currents and magnetic fields

  1. Aug 17, 2007 #1
    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?
  2. jcsd
  3. Aug 17, 2007 #2


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    Homework Helper

    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.
  4. Aug 17, 2007 #3
    Whoa calm it down, seroiusly wat is your problem? im asking the question becuase 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 dont run me down on what i feel i need help on. thanks.!
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