Being a total newbie, I have been reading about logic gates. I got some doubts about flip flops RS(with NOR gates or NAND gates). The flip flops are said to keep a previous state so:
Why an AND gate for example does not mantain its output through time? I mean, if the two inputs are for example 1, the output will be 1 and if I dont change the two inputs, when I read the ouput I will always have 1. So, this is not a way to memorize a value? I am missing something but I dont know what
How electronically speaking, I can read from an output of a gate to know If I have 1 or 0 in its output? I mean, with a multimeter I can read manually the output of a gate but how is done electronically, for example, for reading from an output of a flip flop?
Why is always needed the complemented Q? Its because for reading the Q value and know if I have 1 or 0 I have to read the complemented Q?