Electronics Engineering - Online Test
Q1. The result of the convolution 
is
is
Answer : Option D
Explaination / Solution:
From the convolution property,
Now, we replace t by -t to obtain
Q2. The Boolean expression 
simplifies to
simplifies to
Answer : Option C
Explaination / Solution:
Given the Boolean expression
We simplify the expression as
Q3. In the circuit shown below, the network N is described by the following Y matrix: 
the voltage gain (V2/V1)is
the voltage gain (V2/V1)is
Answer : Option D
Explaination / Solution:
From given admittance matrix we get
Q4. If the transfer function of the following network is
Answer : Option C
Explaination / Solution:
Q5. Which of the following can be pole-zero configuration of a phase-lag controller (lag compensator)?
Answer : Option A
Explaination / Solution:
In phase lag compensator pole is near to j𝜔-axis,
Q6. In the given circuit, the values of V1 and V2 respectively are
Answer : Option A
Explaination / Solution:
By Nodal analysis
Q7. What are the counting states (Q1,Q2) for the counter shown in the figure below
Answer : Option A
Explaination / Solution:
The given circuit is as follows.
The truth table is as shown below. Sequence is 00, 11, 10, 00 ...
The truth table is as shown below. Sequence is 00, 11, 10, 00 ...
Q8. A discrete time signal x[n] = sin (π2n) n being an integer, is
Answer : Option D
Explaination / Solution:
In the given options (A), (B) and (C), we have the periods respectively as
N1 = π
N2 = π2
N3 = π/3
None of the above period is an integer. Since, a discrete time signal has its period
an integer. So, all the three options are incorrect. Hence, we are left with the
option (D). i.e. the discrete time signal x[n] = sin (π2n) is not periodic.
Q9. A four-phase and an eight-phase signal constellation are shown in the figure
below.
For the constraint that the minimum distance between pairs of signal points be
d for both constellations, the radii r1, and r2 of the circles are
Answer : Option D
Explaination / Solution:
Four phase signal constellation is shown below
d2 = r12 + r12
d2 = 2r12
r1 = d/√2 = 0.707d
Q10. Consider a stable system with transfer function
Where b1,
---, bp and a1,
---, aq are real valued constants. The slope of the Bode log magnitude curve of G(s) converges to -60 dB/decade as 𝜔 ⟶ ∞. A possible pair of values for p and q is
Answer : Option A
Explaination / Solution:
