Question

A nand gate has inputs a and b. It's output is connected to both of it's inputs of another nand gate. The equivalent gate for these two nand gates is

Answer 1

The equivalent gate for these two NAND gates is AND gate.

1. If a=1 and b=1 then the  result of two NAND gate is 1.
2. If a=1 and b=0 then the result of two NAND gate is 0.
3. if a=0 and b=1 then the result of two NAND gate is 0.
4. if a=0 and b=0 then the result of two NAND gate is 0.

therefore the equivalent gate for these two NAND gate is ab.

therefore ab is a AND gate.