Question

When a high is applied to the Set line of an SR latch, then ___________

(a) Q output goes high

(b) Q’ output goes high

(c) Q output goes low

(d) Both Q and Q’ go high

The question was posed to me in unit test.

Origin of the question is Latches topic in division Flip-Flops of Digital Circuits

Answer 1

Right answer is (a) Q output goes high

The explanation is: S input of an SR latch is directly connected to the output Q. So when a high is applied Q output goes high and Q’ low.