318. Semi-infinite solenoid and super conducting disc

[Higgs]

Yes the strength line of B in A is not parallel to the axis. We can say, considering the angle of for r=r/2, that or . Hence the proiection of on the axis is Now if it is correct I'll try 2. and 3.

[Tarapìa Tapioco]

Is ?

[Physicsguy51]

Is F = , where is the cross-sectioned area?

Incorrect.

[Physicsguy51]

Yes the strength line of B in A is not parallel to the axis. We can say, considering the angle of for r=r/2, that or . Hence the proiection of on the axis is Now if it is correct I'll try 2. and 3.

Bravo! Try parts 2 and 3 now.

[Tarapìa Tapioco]

I've modified my result. Tell me if it's correct, otherwise I will try another way.

[Physicsguy51]

I've modified my result. Tell me if it's correct, otherwise I will try another way.

Incorrect

[Tarapìa Tapioco]

After many attempts, I calculated it as , where and . If it's correct, I'll write the unfolding, otherwise I'll think about it some more.

[Physicsguy51]

After many attempts, I calculated it as , where and . If it's correct, I'll write the unfolding, otherwise I'll think about it some more.

Incorrect, there's going to be an in the answer too.

[Tarapìa Tapioco]

The would be in , isn't it?

[Physicsguy51]

The would be in , isn't it?

yeah I think, in final answer there will be a term of L