CS Free MCQ Bank

[ Option B ]

The characteristic equation of a flip-flop defines the next state Q(n+1) in terms of the present state Q(n) and the input. In the case of a T flip-flop, when T = 0, the output remains unchanged, meaning the next state is the same as the present state. When T = 1, the flip-flop toggles, so the next state becomes the complement of the present state.
This behavior can be expressed mathematically as: Q(n+1) = T ⊕ Q(n) which is equivalent to Q(n+1) = T·Q̅(n) + T̅·Q(n).

[ Option A ]

A negative level triggered flip-flop is a type of flip-flop that changes its state only when the clock signal is at the low level (0). In other words, when the clock remains at a negative (low) voltage level, the flip-flop becomes active and responds to inputs.