T Flip Flop MCQ Quiz in தமிழ் - Objective Question with Answer for T Flip Flop - இலவச PDF ஐப் பதிவிறக்கவும்
Last updated on Mar 17, 2025
Latest T Flip Flop MCQ Objective Questions
Top T Flip Flop MCQ Objective Questions
T Flip Flop Question 1:
A positive edge-triggered T Flip-Flop has T = 1. If the current output Q is 0, what will be the output Q after 3 clock pulses?
Answer (Detailed Solution Below)
T Flip Flop Question 1 Detailed Solution
The correct answer is option 3) 1
Concept:
Let's analyze the given problem statement and options in detail:
Given:
- T = 1
- Current output Q = 0
Let's analyze the state of Q after each clock pulse:
- Initial state Q = 0
- After 1st clock pulse: Q will toggle from 0 to 1
- After 2nd clock pulse: Q will toggle from 1 to 0
- After 3rd clock pulse: Q will toggle from 0 to 1
Therefore, the output Q after 3 clock pulses will be 1.
T Flip Flop Question 2:
Which one of the following circuits converts a JK F/F to a T F/F?
Answer (Detailed Solution Below)
T Flip Flop Question 2 Detailed Solution
Concept:
T FF truth table
|
T |
Qn |
Qn+1 |
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
1 |
|
1 |
1 |
0 |
JK FF excitation table.
|
Qn |
Qn+1 |
J |
K |
|
0 |
0 |
0 |
X |
|
0 |
1 |
1 |
X |
|
1 |
0 |
X |
1 |
|
1 |
1 |
X |
0 |
Analysis:
In this question, we want to convert the JK flip-flop into T FF.
Conversion of FF is a 3 step process which is given below.
Step 1:
Construct the characteristic table of TFF (which we want to make) and excitation table of JK FF (which is given)
|
T |
Qn |
Qn+1 |
J |
K |
|
0 |
0 |
0 |
0 |
X |
|
0 |
1 |
1 |
X |
0 |
|
1 |
0 |
1 |
1 |
X |
|
1 |
1 |
0 |
X |
1 |
Step 2:
Using the K-map find the Boolean expression for J and K in terms of T
\(\left. {\begin{array}{*{20}{c}} {J = T}\\ {K = T} \end{array}} \right\}\)
Step 3:
Construct the circuit diagram
T Flip Flop Question 3:
What is represented by the digital circuit given above:
Answer (Detailed Solution Below)
An JK flip – flop with A = J and B = K
T Flip Flop Question 3 Detailed Solution
For T. FF ⇒ Q(t+1) = T ⊕ Q
But \(T\; = \;A\;\bar Q + BQ\)
\(\Rightarrow Q\left( {t + 1} \right) = \left( {A\bar Q + BQ} \right) \oplus Q\)
\(\Rightarrow Q\left( {t + 1} \right) = A\bar Q + \bar BQ\)
\(Q\left( {t + 1} \right) = J\bar Q + \bar KQ\)
\(\Rightarrow J = A,\;K = B\)
T Flip Flop Question 4:
A 100 kHz square waveform is applied to the clock input of the flip-flop shown below. The frequency of Q output will be -
Answer (Detailed Solution Below)
T Flip Flop Question 4 Detailed Solution
Calculation:
We are given that a 100 kHz square waveform is applied to the clock input of the flip-flop.
For a flip-flop, the output frequency is typically half of the input clock frequency, because a flip-flop toggles its state on each clock pulse. This means that for every two input pulses, the output changes state once.
Therefore, if the input frequency is 100 kHz, the output frequency will be:
Output frequency = Input frequency / 2
Substituting the given input frequency:
Output frequency = 100 kHz / 2 = 50 kHz
Hence, the frequency of Q output will be 50 kHz.
Final Answer: The correct answer is option 3: 50 kHz.
T Flip Flop Question 5:
Which one of the following circuits converts a JK F/F to a T F/F?
- None of these
Answer (Detailed Solution Below)
T Flip Flop Question 5 Detailed Solution
Concept:
T FF truth table
|
T |
Qn |
Qn+1 |
|
0 |
0 |
0 |
|
0 |
1 |
1 |
|
1 |
0 |
1 |
|
1 |
1 |
0 |
JK FF excitation table.
|
Qn |
Qn+1 |
J |
K |
|
0 |
0 |
0 |
X |
|
0 |
1 |
1 |
X |
|
1 |
0 |
X |
1 |
|
1 |
1 |
X |
0 |
Analysis:
In this question, we want to convert the JK flip-flop into T FF.
Conversion of FF is a 3 step process which is given below.
Step 1:
Construct the characteristic table of TFF (which we want to make) and excitation table of JK FF (which is given)
|
T |
Qn |
Qn+1 |
J |
K |
|
0 |
0 |
0 |
0 |
X |
|
0 |
1 |
1 |
X |
0 |
|
1 |
0 |
1 |
1 |
X |
|
1 |
1 |
0 |
X |
1 |
Step 2:
Using the K-map find the Boolean expression for J and K in terms of T
\(\left. {\begin{array}{*{20}{c}} {J = T}\\ {K = T} \end{array}} \right\}\)
Step 3:
Construct the circuit diagram
T Flip Flop Question 6:
If the input to T flip flop is 100 Hz signal, the final output of the three T flip flops in cascade is__ (in Hz)
Answer (Detailed Solution Below) 12 - 13
T Flip Flop Question 6 Detailed Solution
In T flip flop the output frequency will become half of the input frequency. Here three T flip flops connected in cascade mode.
The output frequency, \({f_o} = \frac{1}{8} \times 100 = 12.5\;Hz\)T Flip Flop Question 7:
A counter made of T flip-flop counts digits according to 2421 (\({{\rm{Q}}_{\rm{A}}}{{\rm{Q}}_{\rm{B}}}{{\rm{Q}}_{\rm{C}}}{{\rm{Q}}_{\rm{D}}}\)) code.
The input \({{\rm{T}}_{\rm{B}}}\) isAnswer (Detailed Solution Below)
T Flip Flop Question 7 Detailed Solution
The present state next state and excitation table of the counter is
T Flip Flop Question 8:
The above circuit can be used as clock generator if
Answer (Detailed Solution Below)
T Flip Flop Question 8 Detailed Solution
XOR gate with one input terminal HIGH acts as an inverter. Thus if \(\rm X=1\) the circuit will acts as a ring oscillator with 3 inverting stages
T Flip Flop Question 9:
The output frequency of a frequency divider circuit that contains 12 flip – flops with an input clock frequency of 20.48 MHz is ______ (in kHz)
Answer (Detailed Solution Below) 5
T Flip Flop Question 9 Detailed Solution
Each flip – flop divides the input frequency by 2. Thus after 12th flip – flop the frequency will be
\(\begin{array}{l} = 20.48/{2^{12}}\\ = \frac{{20.48}}{{4096}}\ MHz\\ = 0.005\ MHz\\ = 5\ kHz \end{array}\)
T Flip Flop Question 10:
The logic circuit shown below. Find the frequency of output in GHz assume propagation delay of
X–NOR gate is zero. The wave form of input A and clk is given below.
Answer (Detailed Solution Below) 0
T Flip Flop Question 10 Detailed Solution
The output of X-NOR gate \(= AB + \bar A\bar B = \bar A\)
and here T – Flip flop is negative triggered ,So the wave forms of output is as follows
Time period of output = ∞
Frequency of output = 0 GHz