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In a diode, when there is a saturation current, the plate resistance (rp), is

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In a diode, when there is a saturation current, the plate resistance (rp), is 

(a) zero 

(b) infinite quantity 

(c) data insufficient 

(d) some finite quantity

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Best answer

The correct option is (b) infinite quantity.

Explanation:

Plate resistance (rp) = δV/δI (where δV is the change in voltage and δI is the change in current. At saturation, current δI = 0 . Therefore at saturation (rp) = δV/0 = ∞.

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