A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
Hi everyone, I having physics exam tomorrow.
I will post my question on the comment section below
anonymous
 one year ago
Hi everyone, I having physics exam tomorrow. I will post my question on the comment section below

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This is the question and the answer

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0But i dont understand the math on the disappeared natural log part

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.2which part? guessing the problem, due to the fact that \(\Phi = \Phi(r)\), Faraday's \(d \Phi / dt\) is chained ruled as \( d \Phi / dr \times d r / dt\) in order to reflect both the rate at which the flux will change due to velocity v but also that fact that \(\Phi\) will change due to a change dr.

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.2the log disappears because you first split out the log's denom ad numerator to make differentiation easy  then you diff and recombine those fractions in the solution.

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0I think that your answers are correct! I got these answers: \[\Large \begin{gathered} \Phi = \frac{{{\mu _0}Ia}}{{2\pi }}\ln \left( {\frac{{r + b/2}}{{r  b/2}}} \right) \hfill \\ \hfill \\ current = \frac{{{\mu _0}Iab}}{{2\pi R}}\frac{1}{{{r^2}  \frac{{{b^2}}}{4}}} \hfill \\ \end{gathered} \]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0the first derivative with respect to time can be written using the chain rule, like this: \[\Large \frac{{d\Phi }}{{dt}} = \frac{{d\Phi }}{{dr}} \times \frac{{dr}}{{dt}}\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0furthermore, we have: \[\Large \frac{d}{{dr}}\left( {\ln r} \right) = \frac{1}{r}\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you guys... Sorry i can only give 1 medal..
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.