Table 5. The voltage ratio between the rod-core sensor, sheet-stacked core sensor, and rolling-sheet core sensor with attenuation resistor
Frequency (Hz)
V
Stack
/ V
Rod
ratio
V
Stack
/ V
Roll
ratio
V
Rod
/ V
Roll
ratio
10
1.08
3.05
2.84
100
1.10
1.56
1.42
1,000
1.08
1.08
1.00
10,000
1.07
1.07
1.00
40,000
0.24
0.23
0.99