Electronics Engineering - Online Test
Q1. A two – bit counter circuit is shown below
It the state QAQB of the counter at the clock time tn is ‘10’ then the state QAQB of the counter at tn + 3 (after three clock cycles ) will be
Answer : Option C
Explaination / Solution:
Q2. 
The Boolean expression for the output f of the multiplexer shown below is
Answer : Option A
Explaination / Solution:
No Explaination.
Q3. The bridge method commonly used for finding mutual inductance is
Answer : Option A
Explaination / Solution:
No Explaination.
Q4. In the circuit shown below what is the output voltage out (Vout) in Volts if a silicon
transistor Q and an ideal op-amp are used?
Answer : Option B
Explaination / Solution:
No Explaination.
Q5. A dielectric slab with 500mm x 500mm cross-section is 0.4m long. The slab is
subjected to a uniform electric field of 
. The relative
permittivity of the dielectric material is equal to 2. The value of constant ε0 is 8.85 × 10-12 F/m. The energy stored in the dielectric in Joules is
. The relative
permittivity of the dielectric material is equal to 2. The value of constant ε0 is 8.85 × 10-12 F/m. The energy stored in the dielectric in Joules is
Answer : Option B
Explaination / Solution:
No Explaination.
Q6. For the BJT circuit shown, assume that the β of the transistor is very large and VBE = . V. The mode of operation of the BJT is
Answer : Option B
Explaination / Solution:
Q7. 
In the following scheme, if the spectrum M(f) of m(t) is as shown, then the spectrum Y(f) of y(t) will be
Answer : Option B
Explaination / Solution:
Q8. Let the Laplace transform of a function F(t) which exists for t > 0 be F1(s) and
the Laplace transform of its delayed version 
be the
complex conjugate of F1(s) with the Laplace variable set as s=σ + jw. If G(s) = 
, then the inverse Laplace transform of G(s) is
be the
complex conjugate of F1(s) with the Laplace variable set as s=σ + jw. If G(s) = , then the inverse Laplace transform of G(s) is
Answer : Option B
Explaination / Solution:
Q9. 
The open loop transfer function G(s) of a unity feedback control system is given as
From the root locus, it can be inferred that when k tends to positive infinity,
Answer : Option A
Explaination / Solution:
Q10. A capacitor is made with a polymeric dielectric having an εr of 2.26 and a
dielectric breakdown strength of 50kV/cm. The permittivity of free space is
8.85pF/m. If the rectangular plates of the capacitor have a width of 20cm and a
length of 40cm, then the maximum electric charge in the capacitor is
Answer : Option C
Explaination / Solution:
