Yeah I felt sort of stupid after I posted this question and figured that out... But with part (a) of the question, closing the switch wouldn't cause a current to flow through it, right? And therefore no magnetic field? Because it doesn't say that the power source is on until part (b)...
Hi everyone,
So I feel sort of stupid posting what you'll probably find is a very elementary question but physics really isn't my best subject and I'm completely stumped. Thanks so much!
Oh, and there's also the possibility that this question is just really badly worded.
Homework Statement...