Table:
0
A
B
C
D
E
1
Material
Resistivity (10 −6 ohm-inches)
Relative permeability
Skin depth, inches
Surface resistance, Relative to copper
2
Carbon steel 1010
9
200
0.004
56.25
3
Stainless steel 432
24.5
200
0.007
87.5
4
Stainless steel 304
29
1
0.112
6.5
5
Aluminum
1.12
1
0.022
1.28
6
Copper
0.68
1
0.017
1

Questions and formulas:
Question: What is the lowest relative permeability with a skin depth larger than 0.112 inches?
Formula: MIN(FILTER(C1, D1>0.112))
Formula2: MIN(FILTER(C2:C6, D2:D6>0.112))
Level: easy
Question: What is the average relative permeability with a resistivity smaller than 1.12 and a surface resistance relative to copper smaller than 1?
Formula: AVERAGE(FILTER(C1, (B1<1.12)*(E1<1)))
Formula2: AVERAGE(FILTER(C2:C6, (B2:B6<1.12)*(E2:E6<1)))
Level: easy
Question: What is the sum of skin depth with a resistivity of 1.12 and a relative permeability larger than 1?
Formula: SUM(FILTER(D1, (B1=1.12)*(C1>1)))
Formula2: SUM(FILTER(D2:D6, (B2:B6=1.12)*(C2:C6>1)))
Level: easy