A steel pipe is constructed of a material for which μr = 200 and σ = 5 × 106 mho/m. The outer and inner radii are 8 and 6 mm respectively and the length is 80 m. If the total current carried by the pipe is 2cos104 πt A, Then the skin depth will be

A steel pipe is constructed of a material for which μr = 200 and σ =

1.	A steel pipe is constructed of a material for which μr = 200 and σ = 5 × 106 mho/m. The outer and inner radii are 8 and 6 mm respectively and the length is 80 m. If the total current carried by the pipe is 2cos104 πt A, Then the skin depth will be
A.	0.225 × 10-3 m
B.	0.300 × 10-3 m
C.	0.352 × 10-3 m
D.	0.125 × 10-3 m
Answer» B. 0.300 × 10-3 m

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A steel pipe is constructed of a material for which μr = 200 and σ = 5 × 106 mho/m. The outer and inner radii are 8 and 6 mm respectively and the length is 80 m. If the total current carried by the pipe is 2cos104 πt A, Then the skin depth will be

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