Question 1

What is a NOR truth table?

Accepted Answer

A NOR truth table shows all input/output combinations for the NOR gate. NOR outputs TRUE (1) only when ALL inputs are FALSE (0). For two inputs: A=0, B=0 → 1; A=0, B=1 → 0; A=1, B=0 → 0; A=1, B=1 → 0. It's the inverse of OR.

Question 2

Is NOR a universal gate like NAND?

Accepted Answer

Yes! NOR is also a universal gate. You can build any logic gate using only NOR gates, just like NAND. Both NAND and NOR gates can create complete digital circuits on their own.

Question 3

What is the Boolean expression for NOR?

Accepted Answer

The NOR expression is (A+B)' or NOT(A OR B). Using De Morgan's theorem, it equals A'·B'. NOR outputs 1 only when both inputs are 0.

Question 4

What's the difference between NOR and NAND?

Accepted Answer

NOR is NOT-OR (outputs 1 only when all inputs are 0), while NAND is NOT-AND (outputs 0 only when all inputs are 1). Both are universal gates, but they invert different base operations.

NOR Truth Table – Universal NOR Gate Calculator

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