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
2). A LED emits visible white light when its
(a) junction is reversed biased (b) depletion layer widens (c) holes and electrons recombine (d) junction becomes hot Ans: (c) holes and electrons recombine.
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