Que. 1
|
The fourier transform of the unit step function is |
| A |
|
f(jw)=j/w |
| B |
|
f(jw)=jw |
| C |
|
f(jw)=1/jw |
| D |
|
f(jw)=1/w |
|
| Que.
2 |
The fourier transform of function f(at) is given by |
| A |
|
f(at)=aF(w) |
| B |
|
f(at)=2/a F(w) |
| C |
|
f(at)=1/a F(w/a) |
| D |
|
none |
|
Que. 3
|
The eigen value of the matrix A= |0 1| are
|1 0| |
| A |
|
1,1 |
| B |
|
-1,-1 |
| C |
|
j,-j |
| D |
|
1,-1 |
|
Que. 4
|
the trigonometric fourier series ofa perodic function can have only |
| A |
|
cosine term |
| B |
|
sine term |
| C |
|
cosine and sine term |
| D |
|
none of these |
|
Que. 5
|
inverse Laplace transform of 10/(s^2)+2s+5 is |
| A |
|
10 (e^-t) sin2t |
| B |
|
5 (e^-t) sin2t |
| C |
|
10 (e^-t) cos2t |
| D |
|
5 (e^-t) cos2t |
|
Que. 6
|
Laplace transform of (e^-at) f(t) is |
| A |
|
F(s) (e^-at) |
| B |
|
F(s-a) |
| C |
|
F(s+a) |
| D |
|
F(s)/(s +a) |
|
Que. 7
|
|Adj A| is equal to |
| A |
|
|A|^n |
| B |
|
|A|^(n-1) |
| C |
|
|A|^(n+1) |
| D |
|
|A^-1| |
|
Que. 8
|
About the fourier series expansion ofa perodic function it can be said
that |
| A |
|
Even function have only a constant and cosine terms in there
FS expansion |
| B |
|
odd function have only sine terms in there FS expansion |
| C |
|
functions with half wave symmetry contain only odd harmonics |
| D |
|
all above the three |
|
Que. 9
|
the final value of [(L^-1)(2s+1)]/[(s^4)+8(s^3)+16(s^2)+s] is |
| A |
|
infinity |
| B |
|
2 |
| C |
|
1 |
| D |
|
0 |
|
Que. 10
|
The fourier transform of a Gaussian time pulse is |
| A |
|
uniform |
| B |
|
A pair of impulses |
| C |
|
Gaussian |
| D |
|
Rayleigh |
|
Que. 11
|
The discrete time system described by y(n)=x(n)^2 is |
| A |
|
causal,linear and time varying |
| B |
|
causal,non-linear and time varying |
| C |
|
non-causal,linear and time invarying |
| D |
|
non-causal,non-linear and time variant |
|
Que. 12
|
Which one of the following transfer functions does correspond to a non-minimum
phase system? |
| A |
|
s/[(s^2)+2s+1] |
| B |
|
(s+1)/[(s^2)+2s+1] |
| C |
|
(s+1)/[(s^2)+2s-1 |
| D |
|
(s-1)/[(s^2)+2s+1] |
|
Que. 13
|
The electromechanical closed loop control system has the following characteristic
equation: [(s^3)+6K(s^2)+(K+2)s+8]=0 where K is the forward gain
of the system.the condition for closed loop stability is |
| A |
|
K=0.528 |
| B |
|
K=2 |
| C |
|
K=0 |
| D |
|
K=-2528 |
|
Que. 14
|
Which of the following signal is/are periodic? |
| A |
|
S(t)=cos2t+cos3t+cos5t |
| B |
|
S(t)=exp[j8(pi)t] |
| C |
|
S(t)=exp(-7t)sin10(pi)t |
| D |
|
S(t)=cos2tcos4t |
|
Que. 15
|
A secound-order system has a transfer function given by G(s)=25/[(s^2)+8s+25]
If the system,initally at rest is subjected to a unit step input at t=0,the
secound peak in response will occur at |
| A |
|
(pi) sec |
| B |
|
(pi) /3 sec |
| C |
|
2(pi)/3 sec |
| D |
|
(pi)/2 sec |
