# Electronics - Flip-Flops and Timers - Discussion

### Discussion :: Flip-Flops and Timers - General Questions (Q.No.2)

2.

When both inputs of a J-K flip-flop cycle, the output will:

 [A]. be invalid [B]. not change [C]. change [D]. toggle

Explanation:

No answer description available for this question.

 Ravi Sinha said: (Sep 30, 2011) Q(next state)=JQ^+K^Q. so the truth table of J K flip flop will be :- J K Q(next state) 0 0 no change(Q) 0 1 reset(0) 1 0 set(1) 1 1 toggle(Q^)

 Asheer said: (Oct 1, 2011) What is the meaning of inputs of j k flipflop cycle?

 Sundar said: (Oct 3, 2011) Assume J=0 and K=1 When cycle it, it becomes as J=1 and K=0.

 Anaya said: (Oct 14, 2011) Then there will be change how answer is no change.

 M.V.KRISHNA/PALVONCHA said: (Dec 29, 2011) Why can't the answer be toggle ?

 Govind Singh said: (Feb 18, 2012) I think correct answer is toggle because at 11 position jk toggle

 Guru said: (Jun 8, 2013) @Sundar clue is correct but small changes. After one cycle the value of each input comes to the same value ex: Assume J=0 and K=1. After 1 cycle, it becomes as J=0->1->0(1 cycle complete) and K=1->0->1(1 cycle complete). So answer is B. not change o/p.

 Adil said: (Mar 24, 2014) @Ravi sinha tabe is right. When they form in cycle they form in 1 & 0 so output become no change.

 BHUJI said: (Jun 28, 2014) What is meant by toggle?

 Ravikanth said: (Nov 6, 2014) @Bhuji. Toggle means complement.

 Vihari said: (Dec 5, 2014) Toggle condition when the J-K flip flop receives the both the inputs as high and clock is also in rise edge the output of the flip flop will be changes to 0 and 1. It will not be constant constant output for every clock cycle it will race in between 1/0/1/0.

 Prashanth said: (Aug 27, 2020) When it cycles like j=1and k=0 then how it becomes no change, It becomes set condition right?

 AL From M.U. said: (Mar 8, 2022) Cycle = 2 x toggle.