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  4. The given electrical network is equivalent to :

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Q. The given electrical network is equivalent to :Physics Question Image

NEETNEET 2017Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

$y_1 = \overline{A + B}$
$y_2 = \overline{y_1 + y_1} = \overline{y_1} = \overline{\overline{A + B}} = A + B $
$ y = \overline{y_2} = \overline{A + B}$

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