| Que.
1 |
For a secound order system with the close loop transfer function
T(s)= 9/[s^2+4s+9] the setting time for 2% band in secounds
is |
| A |
|
1.5 |
| B |
|
2.0 |
| C |
|
3.0 |
| D |
|
4.0 |
|
| Que.
2 |
The Nyquist sampling interval,for the signal sinc(700t)+sinc(500t) is |
| A |
|
1/350 sec |
| B |
|
(pi)/350 sec |
| C |
|
1/700 sec |
| D |
|
(pi)/175 sec |
|
| Que.
3 |
A video transmission system transmitts 625 picture frames/sec. Each frame
consist of a (400*400) pixel grid with 64 intensity levals/pixal.The
data rate of the system is |
| A |
|
16Mbps |
| B |
|
100Mbps |
| C |
|
600Mbps |
| D |
|
6.4Mbps |
|
| Que.
4 |
Let x and y be two statistically independent random variables uniformly
distributed in the ranges (-1,1)and(-2,1) respectively let Z=x+y, then
the probality that is |
| A |
|
0 |
| B |
|
1/6 |
| C |
|
1/3 |
| D |
|
1/12 |
|
| Que.
5 |
The gain margin and the phase margin of a feedback system with G(s)H(s)=s/(s+100)^3
are |
| A |
|
0db,0degree |
| B |
|
infinite,infinite |
| C |
|
infinite,0degree |
| D |
|
88.5dB,infinite |
|
| Que.
6 |
For the polynomial P(s)=s^5+s^4+2s^3+2s^2+3s+15,the number of root which
is right halfe of the s-plane is |
| A |
|
4 |
| B |
|
2 |
| C |
|
3 |
| D |
|
1 |
|
| Que.
7 |
Laplace transform of tsin at is |
| A |
|
2as/[(s^2)+(a^2)]^2 |
| B |
|
2a/[(s^2+a^2)]^2 |
| C |
|
2s/[(s^2)+(a^2)]^2 |
| D |
|
a/[(s^2+a^2)]^2 |
|
| Que.
8 |
1Khz sinusoidal signal is ideally sampled at 1500 samples/sec and the
sasmpled signal is passed though an ideal low-pass filter with cutoff
freq. 800hz the output signal has freq. |
| A |
|
0 hz |
| B |
|
0.75Khz |
| C |
|
0.5Khz |
| D |
|
0.25Khz |
|
| Que.
9 |
A system function has a pole at s=0 and a zero at s=-1 the constant multiplier
is unity for an exitation cos t, the steady state response is given by |
| A |
|
[(sqrt)2] cos(t+45degree) |
| B |
|
[(sqrt)2] cos(t-45degree) |
| C |
|
cos45degree |
| D |
|
1/[(sqrt)2] cos(t+45degree) |
|
| Que.
10 |
For a liner transfer function of the variable, the transfer function of
the system |
| A |
|
changes |
| B |
|
does not change |
| C |
|
has no relation at all |
| D |
|
depends on other fectors also |
|
| Que.
11 |
Asignal phase voltage source square wave inverter feeds pure inductive
load.The waveform of the load current will be |
| A |
|
sinusodal |
| B |
|
rectangular |
| C |
|
trapezoidal |
| D |
|
triangular |
|
| Que.
12 |
The unit ckt of the Nyquist plot transforms into 0dB line of the amplitude
plot the bode digram at |
| A |
|
0 frequency |
| B |
|
low frequency |
| C |
|
high frequency |
| D |
|
any frequency |
|
| Que.
13 |
An instruction used to set the carry flag in a computer can be classified
as |
| A |
|
data transfer |
| B |
|
arithmetic |
| C |
|
logical |
| D |
|
program control |
|
| Que.
14 |
a system function H(s)=V(s)/I(s)=s+2/2s+1 the system is at rest
for t<0.i(t)=unit step. the value of v(t) at t=0 and t=infinite respectively
are |
| A |
|
2 and 1/2 |
| B |
|
1/2 and 2 |
| C |
|
0 and indetermined |
| D |
|
2 and indetermined |
|
| Que.
15 |
H(s)=V(s)/I(s)=4s+6/s+2, i(t)=unit step function. v(t) as t->infinite
is given by |
| A |
|
0 |
| B |
|
3 |
| C |
|
4 |
| D |
|
infinite |