mr_coffee
Nov15-05, 11:42 PM
Figure 29-62 shows a cross section across a diameter of a long cylindrical conductor of radius a = 2.00 cm carrying uniform current 154 A. What is the magnitude of the current's magnetic field at the following radial distances?
http://www.webassign.net/hrw/hrw7_29-62.gif
I figured out parts, A, C, and D. BUt can't get B to work:
(b) 1.15 cm
I tried
PERM = 4PIE-7, I = 154;
B = PERM*I;
which was wrong,
Tried:
B = [PERM*I]/(2PI*R);
Where R = .0115m, which was wrong;
Any ideas what i'm doing wrong here>? :eek:
http://www.webassign.net/hrw/hrw7_29-62.gif
I figured out parts, A, C, and D. BUt can't get B to work:
(b) 1.15 cm
I tried
PERM = 4PIE-7, I = 154;
B = PERM*I;
which was wrong,
Tried:
B = [PERM*I]/(2PI*R);
Where R = .0115m, which was wrong;
Any ideas what i'm doing wrong here>? :eek: