8). For which logic gate the following statement is true The output is low, if and only if all inputs are low
(a) AND (b) NOR (c) NAND (d) OR Ans : (d) OR
Point defect: The defect or imperfection produced in the arrangement of a point like constituent particle, e.g. an atom or an ion or a molecule in the crystalline structure is called point defect.
The point defects are classified as follows: (1) Vacancy defect. (2) Interstitial defect. (3) Impurity defect.
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