What Is the Magnetic Field Inside a Long Solenoid?

[blueforest]

hi,
My homework is : Qualitative description of field due to long solenoid.
I think I post in wrong box, that box is about the calculus problem, right?
But I'm a new member and I don't know where to post my question. So if I'm wrong, I'm sorry, please answer me once and tell me the right box.
Thank you.

 

[Defennder]

For the question you have to think about how the individual induced H components for each loop of the solenoid add up constructively and destructively for both outside and inside the solenoid. I think it helps if you also assume that the coils of the solenoid are tightly wound.