ESE Technical Revision Quiz 22 for ESE & GATE EC Exams

Question 1

Consider the following statements: regarding a common emitter amplifier. It can be converted into an oscillator by
1) Providing adequate positive feedback.
2) Phase shifting the output by 180 ° and feeding this phase-shifted output to the input.
3) Using only a series tuned circuit as a load on the amplifier.
4) Using the negative resistance device as a load on the amplifier.

Question 2

The end-to-end layer of OSI model is:

Question 3

The ability to halt the CPU temporarily and use this interval of time to send information on buses is called.

Question 4

Match List-I (Shape of Nyquist Plot) with List-II (Gain Margin) and select the correct answer using the code given below the lists:
List-I
A) The plot does not intersect negative real axis
B) The plot intersects negative real axis between 0 and (–1, j0)
C) The plot passes through the point (–1, j0)
D) The plot encloses the point (–1, j0)
List-II
1) < 0 dB
2) 0 dB
3) > 0 dB
4) ∞ dB

Question 5

What is the total memory range and memory map, if for a 16-bit address bus;
A₁₅ = 1, A₁₄ = 0 and A₁₃ – A₁₁ are connected to 3 – 8 decoder input lines? A₁₅ and A₁₄ are connected to enable the decoder.
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Question 6

The directivity of a

/2 long wire antenna is

Question 7

A Ge sample at room temperature has intrinsic carrier concentration, n = 1.5×10¹³ cm^-3 and is uniformly doped with acceptor of 3×10¹⁶cm^-3 and donor of 2.5×10¹⁵cm^-3 Then, the minority charge carrier concentration is:

Question 8

In a wave analyzer, if fixed bandwidth frequency is 4 Hz, then what will be the change in percentage of 50 Hz signal without disrupting measurement of 4^th harmonic in an instrument?

Question 9

Statement (I): In a conventional transmission line impedance matching can be accomplished by stub matching of adjustable lengths. .
Statement (II): In practice impedance matching in wave-guides is obtained by tuning screws inserted into the waveguide.

Question 10

Find the energy stored inside a parallel plate capacitor with capacitance as 18 nF and plate area as 2 cm² separated by 0.4 mm thick dielectric having a potential difference of 20 volts.