A knife sharpener is an electrical device for sharpening the blades of a knife. The alternating electric and magnetic fields at the fundamental frequency of 50 Hz resp. 60 Hz are caused by the motor rotating the grinding wheel.
| Measurand | Value | Feature | Remarks |
|---|---|---|---|
| magnetic flux density | 1.002 mT (maximum, calculated) | - | at the surface of the device at 50 Hz [1] |
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