Question

2. A pipe of inner radius b = 2.00 cm and outer radius a = 4.00 cm, whose cross section is shown below, carries a current of ip = 50 A directed out of the page that is uniform across its cross-sectional area. A thin wire, coaxial with the pipe at r = 0, carries a current of iw = -30 A directed into of the page. Determine the magnetic field at points: a) r = 1.00 cm b) r = 3.00 cm c) r = 5.00 cm d) Is there a location where the magnetic field equals zero? If so, calculate it. If not, why not?

Answer 1

Solution :---->>>

SOLUTION 0 r=1 By Ampere's Lain I B. II= Mo I Bx 274 = Mo I = BP UP X (03) 27 3 . 3850 o jos ras 4 X 4* 32 Ipxq t isode 44 (42-32) 1e IS A Inlet Is -30 7 7-SA (B. al = Mo I o Ba Mox76 I'm fort 9=50 İ= 50-80 = 20 A D So, SB dl = Mora BX 2015) = M. 820 | B= 24 Da @ No there is no location where Magnetic field is met zero as there is no pont where met current enclosed in zerwe 2*X3