Electrical Engineering - Online Test
Q1. A voltage commutated chopper circuit, operated at 500Hz, is shown below.
If the maximum value of load current is 10A, then the maximum current through the main (M) and auxiliary (A) thyristors will be
Answer : Option A
Explaination / Solution:
Q2. The matrix 
is decomposed into a product of a lower triangular
matrix [L] and an upper triangular matrix [U]. The properly decomposed [L] and
[U] matrices respectively are
is decomposed into a product of a lower triangular
matrix [L] and an upper triangular matrix [U]. The properly decomposed [L] and
[U] matrices respectively are
Answer : Option D
Explaination / Solution:
[A] = [L][U] Option D is correct
Q3. 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:
Q4. 
The Boolean expression for the output f of the multiplexer shown below is
Answer : Option A
Explaination / Solution:
No Explaination.
Q5. The bridge method commonly used for finding mutual inductance is
Answer : Option A
Explaination / Solution:
No Explaination.
Q6. 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.
Q7. 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.
Q8. 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:
Q9. 
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:
Q10. 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:
