Drawing field lines through solenoid question. Help!

[PB]

Hey peeps,
I came across some VCAA questions that ask you to draw field lines through solunoids.
 I know that it is necessary to show that the lines do not touch and increase in distance each time , however, is it required to show that at least one line goes straight through the coil? This was suggested in the VCAA 2006 exam 2 Section A question 1 solutions but I am not sure if it still applies this year?
Thanks in advance +1

[Alwin]

Hey peeps,
I came across some VCAA questions that ask you to draw field lines through solunoids.
I know that it is necessary to show that the lines do not touch and increase in distance each time , however, is it required to show that at least one line goes straight through the coil? This was suggested in the VCAA 2006 exam 2 Section A question 1 solutions but I am not sure if it still applies this year?
Thanks in advance +1

Hi PB, good to hear you're doing past exams already

ideally, you want to draw several lines, since the lines outside of the coil pass throught the middle too. If you only had one line through the middle, that would be one very lonely magnetic field



^^ Just an example. I like it because it shows the mnemonic thing, with the S and N

[PB]

hey Alwin,
Thanks for replying! Unfortunately I haven't started exam practice yet ( its just questions like from Checkpoints and stuff! But um, wouldn't you lose marks for not showing that those two field lines join up in a continuous loop? Could, I just do all of the lines as loops? So like, is it neccessary to show one line as going straight through the middle of the coil (like straight as a ruller straight). This was shown in the solutions of the exam question
Thanks!