Multiple choice

A JK flip-flop has its J input connected to logic level 1 and its input to the Q output, a clock pulse is fed to its clock input, the flip flop will now

  1. change its state at each clock pulse

  2. go to state 1 and stay there

  3. go to state 0 & stay there

  4. retain its previous state
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A Correct answer
Explanation

With J=1 and K=Q, the flip-flop toggles between states: if Q=0, then J=1,K=0 causes Q→1; if Q=1, then J=1,K=1 causes Q→0. This creates a toggle action at every clock pulse.

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