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| total opposition to alternating current by an electric circuit |
| opposition of inductance and capacitance to alternating current |
| screen grid | |
| —n | |
| electronics See also suppressor grid Sometimes shortened to: screen an electrode placed between the control grid and anode of a valve and having a fixed positive potential relative to the grid. It acts as an electrostatic shield preventing capacitive coupling between grid and anode, thus increasing the stability of the device | |