Que. 1
|
An amplifier has an open loop gain of 100, an input impadence of 1kohm,and
an output impedance of 100ohm.a feedback network with a feedback
fector of 0.99 is connected to the amplifier in a voltage series
fedback mode the new input and output impedance respectively are |
| A |
|
10 ohm and 1 ohm |
| B |
|
10 ohm and 10 kohm |
| C |
|
100 ohm and 1 ohm |
| D |
|
100 kohm and 1 kohm |
|
| Que.
2 |
In a twin wire transmisssion line in the air the adjacent voltage maximum
are at 12.5cm and 27.5cm the operating freq. is |
| A |
|
300mhz |
| B |
|
1Ghz |
| C |
|
2Ghz |
| D |
|
6.28Ghz |
|
Que. 3
|
The band width of an N stage tunedamplifire with each stage having a
band width of B, is given by |
| A |
|
B/n |
| B |
|
B/(sqrt)n |
| C |
|
B[(sqrt)2^[1/n]-1 |
| D |
|
B/[(sqrt)(/2^[1/n]-1] |
|
Que. 4
|
the resolution of a 12-bit D/A convertor using a binary ladder with 10v
as the full scale output will be |
| A |
|
2.44mA |
| B |
|
3.50mA |
| C |
|
4.32mA |
| D |
|
5.12mA |
|
Que. 5
|
the number of comparetor ckt requires to build a 3-bit simultaneous A/D
convrtor is |
| A |
|
7 |
| B |
|
8 |
| C |
|
15 |
| D |
|
16 |
|
Que. 6
|
A magnetic drum of 8 inches diameter has 100 tracks and storage density
of 200bits/inches its storage capacity will be |
| A |
|
502400 bits |
| B |
|
8402 bits |
| C |
|
1004800 bits |
| D |
|
202400 bits |
|
Que. 7
|
the function of inhabit line in a memory in |
| A |
|
to write 1 in a core |
| B |
|
to read 1 in a core |
| C |
|
to write 0 in a core |
| D |
|
to stop writing 1 in a core |
|
Que. 8
|
the storage time of transistor is the part of the |
| A |
|
turn on time |
| B |
|
turn off time |
| C |
|
fall time |
| D |
|
rise time |
|
Que. 9
|
if the turn on time of a transistor is decreases its turn on time |
| A |
|
decreases |
| B |
|
increases |
| C |
|
is not affected |
| D |
|
infinite |
|
Que. 10
|
for an input pulse train of clock period T,the delay produced by an n
stage shift resister |
| A |
|
(n-1) |
| B |
|
2n |
| C |
|
(n+1)T |
| D |
|
2nT |
|
Que. 11
|
If the memory chip size is 256*1 bits,then the member of chips required
to make up 1k bytes of memory is |
| A |
|
32 |
| B |
|
24 |
| C |
|
12 |
| D |
|
8 |
|
Que. 12
|
In sign magnitude numbers |
| A |
|
the leading bit stands for the sign |
| B |
|
the leading bit is part of the magnitude |
| C |
|
the leading bit is always zero |
| D |
|
the leading bit is always |
|
Que. 13
|
what is dule of X + X'Y =X + Y |
| A |
|
X + Y = XY |
| B |
|
X' + XY = XY |
| C |
|
X(X' + Y) = XY |
| D |
|
X'(X + Y) = X + Y |
|
Que. 14
|
The "Pinch off" voltage of a JFET is 0.5 volts. Its "Cut Off" votage is |
| A |
|
(0.5)^1/2 v |
| B |
|
2.5 v |
| C |
|
5.0 v |
| D |
|
(5.0)^3/2 v |
|
Que. 15
|
four independent message have bandwidth of 100hz, 200hz, and 400hz,respectively
each is sampled at the Nyquist rate and the samples are time division
multiplexed and transmitted sample rate is |
| A |
|
1600 |
| B |
|
800 |
| C |
|
400 |
| D |
|
200 |
|
Que. 16
|
in the CMOS inventor 1.
Both are enchancement Type 2. One transistor
is N Channel and the other 3.
Both are N Channel with one enchancement
and the other depletion type 4. one is enchancement and the other depletion
type Of the above 4 statment the only true one are |
| A |
|
4 |
| B |
|
1 and 2 |
| C |
|
1 and 3 |
| D |
|
none of these |
