Counting the number and size of electrical interferences created by blood cells as they pass through a small aperture is a description of which of the following principles?

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This is describing electronic impedance, which is a technique used in impedance cytometry to measure the electrical properties of cells as they pass through a small aperture. The electrical interference created by the blood cells passing through the aperture can be used to count and size the cells.

Counting the Number and Size of Electrical Interferences Created by Blood