This preview shows page 1. Sign up to view the full content.
Unformatted text preview: 33. (a) We use B · ds = µ0 Ienclosed to ﬁnd
B =
= µ0 Ienclosed
µ0 (Jd πr2 )
1
=
= µ0 Jd r
2πr
2πr
2
1
2
−6
(1.26 × 10 H/m)(20 A/m )(50 × 10−3 m) = 6.3 × 10−7 T .
2 (b) From
id = Jd πr2 = ε0 dΦE
dE
= ε0 πr2
dt
dt we get
2 V
dE
20 A/m
Jd
=
=
= 2.3 × 1012
.
−12 F/m
dt
ε0
8.85 × 10
m·s ...
View
Full
Document
This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.
 Fall '08
 SPRUNGER
 Physics

Click to edit the document details