A:-CB amplifier has low input impedance and a low current gain
B:-CC amplifier has low output impedance and a low current gain
C:-CE amplifier has very poor voltage gain but very high input impedance
D:-none of the above
Correct Answer:- Option-A
Question38:-In antenna measurement using two aperture antennas of dimensions D1 and D2, minimum speparation
between the two should be (A is free space wavelength of radiation uses)
‏01)-:ھ‎ + 02(/)2۸(
8:01 2402-2) /0
(21220222) (8%)
0:- (01721022) 722)
Correct Answer:- Option-B
Question39:-Compared to the junction transistor, FET
1) Has a larger gain banwidth product
2} Is less noisy
3) Has less input resistance
4) Has only the majority carrier flow
The correct statements are
Al 3
:-1, 2

C:-3,4
0:-2, 4
Correct Answer:- Option-D

Question40:-How does 80386 change operation from real mode to protected mode 7
A:-By resetting MSB of CR1 contents
B:-By setting MSB of CRO contents
C:-By setting MSB of CR1 contents
D:-By setting MSB of CR2 contents
Correct Answer:- Option-B

Question41:-A source follower {using a FET) usually has a voltage gain which is
A:-Slightly less than unity, but positive
B:-Greater than +1
C:-Exactly unity but negative
D:-About — 10
Correct Answer:- Option-A

Question42:-Which of the following logic family consumes the least amount of power 7
‏۸271ھ‎
‎B:-ECL
‎ட
‎D:-CMOS
‎Correct Answer:- Option-D

Question43:-In a 100% amplitude modulated signal, the power in the lower sideband

watts and modulation system to be SSBSC.

A:-50 watts
B:-100 watts
C:-25 watts
D:-None of these
Correct Answer:- Option-C
Question44:-A combinational logic circuit which is used to sen data coming from a source to two or more seperate
destinations is called as
A:-Demultiplexer
B:-Encoder
C:-Multiplier
D:-Decoder
Correct Answer:- Option-A
Question45:-The pinch off voltage of a JFET is 5V. Its cut off voltage is
A (5.0 172y v
6.۷
C:- (5.0 3RV
0:-5.0 ४

: Assume carrier power to be 100