For a JK Flip-flop: When J = 0, K = 1, Qn+1 = 0 ...

52) For a JK Flip-flop:

• When J = 0, K = 1, Q_n+1 = 0
• When J = 1, K = 1, Q_n+1 = 1
• When J = 1, K = 1, Q_n+1 = Q-_n
• When J = 1, K = 0, Q_n+1 = 1
• When J = 1, K = 0, Q_n+1 = 0

Choose the correct answer from the options given below:

1. 1. A, C and D only [Option ID = 3117]
2. 2. B and D only [Option ID = 3118]
3. 3. C and E only [Option ID = 3119]
4. 4. A, C and E only [Option ID = 3120]

Answer: 1

Solution

• Statement A: When J = 0, K = 1, 

  $Q_{n+1}=0$

  • Evaluation: Correct. This is the Reset condition.

• Statement B: When J = 1, K = 1, 

  $Q_{n+1}=1$

  • Evaluation: Incorrect. When both inputs are 1, the output toggles (

    ${\bar{Q}}_n$

    ), it isn't fixed at 1.

• Statement C: When J = 1, K = 1, 

  $Q_{n+1}={\bar{Q}}_n$

  • Evaluation: Correct. This is the standard Toggle condition for a JK flip-flop.

• Statement D: When J = 1, K = 0, 

  $Q_{n+1}=1$

  • Evaluation: Correct. This is the Set condition.

• Statement E: When J = 1, K = 0, 

  $Q_{n+1}=0$

  • Evaluation: Incorrect. 

    $J=1,K=0$

     sets the output to 1, not 0.

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