8. From Sample Problem 321 we know that
B
∝
r
for
r
≤
R
and
B
∝
r
–1
for
r
≥
R
. So the
maximum value of
B
occurs at
r = R
, and there are two possible values of
r
at which the
magnetic field is 75% of
B
max
. We denote these two values as
r
1
and
r
2
, where
r
1
<
R
and
r
2
>
R
.
(a) Inside the capacitor, 0.75
B
max
/
B
max
=
r
1
/
R
, or
r
1
= 0.75
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics

Click to edit the document details