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The output Qn of a JK flip-flop is zero. It changes to 1 when a clock pulse is applied. The input Jn and Kn are respectively
- a)1 and X
- b)0 and X
- c)X and 0
- d)X and 1
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The output Qnof a JK flip-flop is zero. It changes to 1 when a clock p...
Explanation:
To understand the given question and the correct answer, let's first review the operation of a JK flip-flop.
A JK flip-flop is a sequential logic device that has two inputs, J (set) and K (reset), and two outputs, Q (output) and Q' (complement of the output). The flip-flop operates based on clock pulses, which determine when the inputs are accepted and when the outputs are updated.
The behavior of a JK flip-flop is defined by its truth table:
Truth Table:
J K Qn Qn+1
0 0 0 0
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 1
1 1 1 0
In the given question, it is stated that the output Q of the JK flip-flop is initially 0. When a clock pulse is applied, the output changes to 1. Based on this information, we can deduce the values of the J and K inputs.
Analysis:
Since the initial output Q is 0 and changes to 1 on a clock pulse, we need to find the input combination that satisfies this behavior.
From the truth table, we observe that the output Q changes to 1 when J is 1 and K is 0. This is the only input combination that results in a change from 0 to 1 on the output Q.
Therefore, the correct answer is option 'A' - J = 1 and K = X (don't care).
Explanation:
The reason why the correct answer is J = 1 and K = X (don't care) can be explained as follows:
When J = 1 and K = X (don't care), the flip-flop operates in the following manner:
- When the clock pulse is applied, the flip-flop checks the values of J and K.
- Since J is 1, the flip-flop sets the output Q to 1, regardless of the value of K.
- As a result, the output Q changes from 0 to 1 on the clock pulse.
It is important to note that in this specific scenario, the value of K is not relevant because the J input takes precedence. When J is 1, the output Q will always change to 1, regardless of the value of K.
This behavior is specific to the JK flip-flop and is not applicable to other types of flip-flops, such as D or T flip-flops.
Conclusion:
In summary, the output Q of a JK flip-flop changes from 0 to 1 when a clock pulse is applied. This behavior is achieved when the input J is 1 and the input K is don't care (X). Therefore, the correct answer to the given question is option 'A' - J = 1 and K = X.
To understand the given question and the correct answer, let's first review the operation of a JK flip-flop.
A JK flip-flop is a sequential logic device that has two inputs, J (set) and K (reset), and two outputs, Q (output) and Q' (complement of the output). The flip-flop operates based on clock pulses, which determine when the inputs are accepted and when the outputs are updated.
The behavior of a JK flip-flop is defined by its truth table:
Truth Table:
J K Qn Qn+1
0 0 0 0
0 0 1 1
0 1 0 0
0 1 1 0
1 0 0 1
1 0 1 1
1 1 0 1
1 1 1 0
In the given question, it is stated that the output Q of the JK flip-flop is initially 0. When a clock pulse is applied, the output changes to 1. Based on this information, we can deduce the values of the J and K inputs.
Analysis:
Since the initial output Q is 0 and changes to 1 on a clock pulse, we need to find the input combination that satisfies this behavior.
From the truth table, we observe that the output Q changes to 1 when J is 1 and K is 0. This is the only input combination that results in a change from 0 to 1 on the output Q.
Therefore, the correct answer is option 'A' - J = 1 and K = X (don't care).
Explanation:
The reason why the correct answer is J = 1 and K = X (don't care) can be explained as follows:
When J = 1 and K = X (don't care), the flip-flop operates in the following manner:
- When the clock pulse is applied, the flip-flop checks the values of J and K.
- Since J is 1, the flip-flop sets the output Q to 1, regardless of the value of K.
- As a result, the output Q changes from 0 to 1 on the clock pulse.
It is important to note that in this specific scenario, the value of K is not relevant because the J input takes precedence. When J is 1, the output Q will always change to 1, regardless of the value of K.
This behavior is specific to the JK flip-flop and is not applicable to other types of flip-flops, such as D or T flip-flops.
Conclusion:
In summary, the output Q of a JK flip-flop changes from 0 to 1 when a clock pulse is applied. This behavior is achieved when the input J is 1 and the input K is don't care (X). Therefore, the correct answer to the given question is option 'A' - J = 1 and K = X.
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Community Answer
The output Qnof a JK flip-flop is zero. It changes to 1 when a clock p...
Characteristic Table of JK flip flop is:
Qn+1 = JQ̅n + K̅Qn
Based on the table we can see the correct input combination is 1 0 and 1 1.
∴ Option A is correct.
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The output Qnof a JK flip-flop is zero. It changes to 1 when a clock pulse is applied. The input Jnand Knare respectivelya)1 and Xb)0 and Xc)X and 0d)X and 1Correct answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The output Qnof a JK flip-flop is zero. It changes to 1 when a clock pulse is applied. The input Jnand Knare respectivelya)1 and Xb)0 and Xc)X and 0d)X and 1Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The output Qnof a JK flip-flop is zero. It changes to 1 when a clock pulse is applied. The input Jnand Knare respectivelya)1 and Xb)0 and Xc)X and 0d)X and 1Correct answer is option 'A'. Can you explain this answer?.
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