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ECIL GET 2017 Recruitment: Electronics Section Quiz 8

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Question 1

If the emitter bypass capacitor in a common emitter amplifier is removed, then

Question 2

Use of a series-shunt negative feedback in an amplifier will

Question 3

A 70 MHz carries is QPSK modulated by a 1.544 Mbps T1 data stream. The transmitter employs a raised-cosine filter with

. What is the transmitted bandwidth of the signal?

Question 4

Which of the following modulation scheme is most bandwidth efficient?

Question 5

What are poles and zeroes of system having following transfer function?
H(z) =

Question 6

A memory system of size 16 k bytes is required to be designed using memory chips which have 12 address lines and 4 data lines each Then number of such chips required to design the memory system is

Question 7

A certain JK FF has t_pd=12 ns. The largest MOD counter that can be constructed from such FFs and still operate up to 10 MHz is

Question 8

If the electric field vector is

and the magnetic field vector is

then

is equal to

Question 9

Consider a sequence x(n) = [2, 4, 6, 8, 0, 1, 3, 5, 7, 9]. Down-sample the sequence by 3 and then up-sample by 2. The resulting sequence is :

Question 10

If f(t) is 1 MHz sinusoid with 1 Vp-p and sampling frequency fs is 25 kHz, the output
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