Electronics Engineering - Online Test
Q1. A vector 
is given by 
Which one of the following statements is TRUE?
is given by Which one of the following statements is TRUE?
Answer : Option A
Explaination / Solution:
Given vector,
If divergence 
then vector 
is solenoidal. So, we obtain
then vector is solenoidal. So, we obtainHence, it is solenoidal.
Again, if curl 
then 
is irrotational. So, we obtain
then is irrotational. So, we obtain
Q2. Consider a causal LTI system characterized by differential equation 
The response of the system to the input 
where u(t) denotes the unit step
function, is
The response of the system to the input where u(t) denotes the unit step
function, is
Answer : Option D
Explaination / Solution:
Q3. Four messages band limited to W,W,2W and 3W respectively are to be multiplexed using Time Division Multiplexing (TDM). The minimum bandwidth required for transmission of this TDM signal is
Answer : Option D
Explaination / Solution:
Bandwidth of TDM is
= 1/2 (sum of Nyquist Rate)
= 1/2 [2W + 2W + 4W + 6W] = 7W
Q4.
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.
Q5. 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.
Q6. An SCR is considered to be a semi-controlled device because
Answer : Option C
Explaination / Solution:
No Explaination.
Q7. 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:
Q8. 
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.
Q9. 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:
Q10. 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:
