Electrical Engineering - Online Test
Q1. For a complex number z, 
is
is
Answer : Option D
Explaination / Solution:
Q2. The switch in the circuit has been closed for a long time. It is opened at t = 0. At t = 0+,
the current through the 1ยตF capacitor is
Answer : Option B
Explaination / Solution:
No Explaination.
Q3. The characteristic equation of a closed-loop system is
s(s + 1)(s + 3) + k(s + 2) = 0, k > 0. Which of the following statements is true?
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. 
Given f(t) and g(t) as shown below:
g(t) can be expressed as
Answer : Option D
Explaination / Solution:
No Explaination.
Q5. X(t) is a stationary process with the power spectral density Sx(f)>0, for all f . The process is passed through a system shown below
Let Sy (f ) be the power spectral density of Y(t). Which one of the following statements is correct
Answer : Option D
Explaination / Solution:
Q6. Out of the following plant categories
(i) Nuclear
(ii) Run-of-river
(iii) Pump Storage
(iv) Diesel
The base load power plants are
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. An 8085 assembly language program is given below.
Line 1: MVI A, B5H
2: MVI B, OEH
3: XRI 69H
4: ADD B
5: ANI 9BH
6: CPI 9FH
7: STA 3010H
8: HLT
After execution of line 7 of the program, the status of the CY and Z flags will be
Answer : Option C
Explaination / Solution:
No Explaination.
Q8. In the figure, assume that the forward voltage drops of the PN diode D1 and
Schottky diode D2 are 0 7. V and 0 3. V, respectively. If ON denotes conducting
state of the diode and OFF denotes non-conducting state of the diode, then in
the circuit,
Answer : Option D
Explaination / Solution:
Alternatively, we can solve the problem by considering the current through two
diodes. Here, the correct case is only considered. 
Case : Diode D1 is OFF, D2 is ON. For this case. The equivalent circuit is
From the circuit, we have
I1 = 0
I2 = 10 - 2.3/1.02
= 9.7/1.02
= 9.5 mA
Since, the current I2 is positive, So our assumption is correct.
Q9. The matrix 
has three distinct eigenvalues and one of its eigenvectors is 
Which one of the following can be another eigenvector of A?
has three distinct eigenvalues and one of its eigenvectors is Which one of the following can be another eigenvector of A?
Answer : Option C
Explaination / Solution:
By the properties of Eigen values and Eigen vectors, another eigen vector of A is 
The eigen vectors corresponding to distinct eigen values of a real symmetric matrix are
orthogonal i.e., pair wise dot product is zero
Q10. As shown in the figure, a 1โฆ resistance is connected across a source that has a load line v + i =
100. The current through the resistance is
Answer : Option B
Explaination / Solution:
No Explaination.
