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Physics Question on Semiconductor electronics: materials, devices and simple circuits

In the following circuit, what are P and Q?

A

P = 0, Q = 1

B

P = 0, Q = 0

C

P = 1, Q = 1

D

P = 1, Q = 0

Answer

P = 0, Q = 1

Explanation

Solution

For both NOR gates  y=A+B‾\, y=\overline{A+B} For gate 1, A=1∴ p=0For \,gate\,1, \,A = 1\quad\therefore\, p=0 For gate 2, B=0∴ Q=1For \,gate \,2, \,B = 0\quad\therefore\, Q=1