C:-BPSK and QPSK
D:-BPSK and PAM
Correct Answer:- Option-D
Question19:-The negative resistance of the tunnel diode occurs when the bias voltage is
A:-Between the peak and valley voltages
B:-Above the valley voltage
C:-Below the peak voltage
D:-In the reverse direction
Correct Answer:- Option-A
Question20:-In an RC differentiator, the condition for differentiation is
A:-RC >> 0.16T
B:-RC << 0.16T
C:-RC >>T/0.16
D:-RC << T/0.16
Correct Answer:- Option-B
Question21:-For an input pulse train of clock period T, the delay produced by an n stage shift register is
ಹಿ
B:-nT
6:40 + 7
D:-(n-1)T
Correct Answer:- Option-C
Question22:-An n-channel JFET has 55 =1 mA and ` ४ (#)` = -5 V. Its maximum transconductance is

Correct Answer:- Option-A
Question23:-For thyristors, pulse triggering is preferred to dc triggering because
A:-Gate dissipation is low
B:-Pulse system is simpler
C:-Triggering system is required for a very short duration
D:-All of these
Correct Answer:- Option-D
Question24:-If an amplifier with a gain of —1000 and feedback of B=—0.1 had a gain change of 20% due to temperature, the
change in gain of the feedback amplifier would be
2:-0.2%
8:-5%
C:-10%
D:-0.01%
Correct Answer:- Option-A
Question25:-The sensitivity of a multimeter is given in
ಹ
8:4൫
C:-Amperes
பாம்‌
Correct Answer:- Option-B
Question26:-A superheterodyne radio receiver with an intermediate frequency of 455 KHz is tunded to a station operating at
1200 KHz. The associated image frequency 5

A:-55 KHz

B:-1110 KHz

C:-2110 KHz

D:-4220 KHz

Correct Answer:- Option-C
Question27:-The multivibrator circuit configuration that can be used to convert a sinusoidal input into a square wave output
is

A:-A stable multivibrator

B:-Monostable multivibrator

C:-Bistable multivibrator

D:-Schmitt trigger

Correct Answer:- Option-D