Electrical Engineering - Online Test
Q1.
For a N -point FET algorithm N = 2m which one of the following statements is TRUE ?
Answer : Option D
Explaination / Solution:
For an N-point FET algorithm butterfly operates on one pair of samples and involves two complex addition and one complex multiplication.
Q2. When a “CALL Addr” instruction is executed, the CPU carries out the following sequential operations internally:
Note:
(R) means content of register R
((R)) means content of memory location pointed to by R
PC means Program Counter
SP means Stack Pointer
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. An SCR is considered to be a semi-controlled device because
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. Suppose that resistors R1 and R2 are connected in parallel to give an equivalent resistor R. If
resistors R1 and R2 have tolerance of 1% each., the equivalent resistor R for resistors R1 =
300Ω and R2 = 200Ω will have tolerance of
Answer : Option B
Explaination / Solution:
Q5. The z-Transform of a sequence x[n] is given as X(z) = 2z+4-4/z+3z2. If y[n] is the first
difference of x[n], then Y(z) is given by
Answer : Option A
Explaination / Solution:
y(n) is first difference of x(n) So
g(n)=x(n)-x(n-1)
Q6. 
In the following a stable multivibrator circuit, which properties of V0(t) depend on R2?
Answer : Option A
Explaination / Solution:
The R2 decide only the frequency.
Q7. Consider the following asymptotic Bode magnitude plot (ω is in rad/s).
Which one of the following transfer functions is best represented by the above Bode magnitude plot?
Answer : Option A
Explaination / Solution:
Q8. Consider the function ݂f(z) = z + z* where z is a complex variable and z* denotes its complex
conjugate. Which one of the following is TRUE?
Answer : Option B
Explaination / Solution:
Q9. The force on a point charge +q kept at a distance d from the surface of an infinite grounded metal plate in a medium of permittivity 𝜖 i
Answer : Option C
Explaination / Solution:
Consider the point charge +q and infinite surface as shown below.
We can replace the image charge by a negative equivalent charge -q placed at
2d distance from +q charge
Hence, the force experienced by +q charge is
Q10. A source is supplying a load through a 2-phase, 3-wire transmission system as shown in figure
below. The instantaneous voltage and current in phase-a are Van = 220sin(100πt)V and ia = 10sin(100πt)A, respectively. Similarly for phase-b the instantaneous voltage and current
are Vbn = 220cos(100πt)V and ib = 10cos(100πt)A, respectively.
The total instantaneous power flowing form the source to the load is
Answer : Option A
Explaination / Solution:
