Discussion :: Digital Electronics
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In the figure, the LED
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A.
emits light when both S1 and S2 are closed
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B.
emits light when both S1 and S2 are open
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C.
emits light when only S1 and S2 is closed
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D.
does not Emit light, irrespective of the switched positions
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Answer : Option D
Explanation :
To emit the light, it is necessary NAND gate output is zero, for NAND O/P zero. Both the I/O must be height. And it is not possible in any case.
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