Discussion
Identify whether the given statements are true or false.
1. T-flipflop is a digital circuit with two stable states.
2. For T = 0, the T-flipflop retains the same state at output.
Answer: A
Both statements are true. A T (toggle) flipflop is a bistable circuit: it has two stable states, which it holds until a clock pulse arrives. Its characteristic equation is \(Q_{next} = T \oplus Q\), so when \(T = 0\) the output is unchanged, and when \(T = 1\) the output toggles on the clock edge.
So the pair 1 true and 2 true is correct. The other options call one or both statements false, which contradicts the definition and the truth table. The answer is option A.
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