NPCIL question papers for Electronics

Will you please provide me the previous year NPCIL question papers for Electronics?

[Kiran Chandar]

NPCIL stands for Nuclear Power Corporation of India Limited

NPCIL Question Papers in Electronics

An ideal operational amplifier has
A. infinite output impedance
B. zero input impedance
C. infinite bandwidth
D. All of the above

Another name for a unity gain amplifier is:
A. difference amplifier
B. comparator
C. single ended
D. voltage follower

The open-loop voltage gain (Aol) of an op-amp is the
A. external voltage gain the device is capable of
B. internal voltage gain the device is capable of
C. most controlled parameter
D. same as Acl

What is the output waveform?
A. sine wave
B. square wave
C. sawtooth wave
D. triangle wave

A series dissipative regulator is an example of a:
A. linear regulator
B. switching regulator
C. shunt regulator
D. dc-to-dc converter

An inductance of 0.08 H is larger than
A. 0.0000008 H
B. 0.000000008 H
C. 0.000008 H
D. 0.00008 mH

A 240 H inductor is equivalent to a
A. 0.240 mH inductor
B. 0.000240 mH inductor
C. 240 mH inductor
D. 240 H inductor

A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
A. 55 mH
B. less than 0.2 mH
C. less than 5.5 mH
D. 5.5 mH

A 5 mH, a 4.3 mH, and a 0.6 mH inductor are connected in parallel. The total inductance is
A. 9.9 mH
B. greater than 5 mH
C. 9.9 mH or greater than 5 mH
D. less than 0.6 mH

The voltage across a coil when di/dt = 20 mA/s and L = 8 H is
A. 16 mV
B. 160 mV
C. 1.6 mV
D. 2.5 mV

Choose the most appropriate word from the options given below to complete the following
sentence.
Communication and interpersonal skills are_____ important in their own ways.
(A) each (B) both (C) all (D) either
Answer: (B)

Which of the options given below best completes the following sentence?
She will feel much better if she ________________.
(A) will get some rest (B) gets some rest
(C) will be getting some rest (D) is getting some rest
Answer: (B)

Choose the most appropriate pair of words from the options given below to complete the
following sentence.
She could not _____ the thought of _________ the election to her bitter rival.
(A) bear, loosing (B) bare, loosing (C) bear, losing (D) bare, losing
Answer: (C)

A regular die has six sides with numbers 1 to 6 marked on its sides. If a very large number of
throws show the following frequencies of occurrence: 1→ 0.167; 2→ 0.167; 3→ 0.152; 4→
0.166; 5→ 0.168; 6 → 0.180. We call this die
(A) irregular (B) biased (C) Gaussian (D) insufficient

Lights of four colors (red, blue, green, yellow) are hung on a ladder. On every step of the
ladder there are two lights. If one of the lights is red, the other light on that step will always
be blue. If one of the lights on a step is green, the other light on that step will always be
yellow. Which of the following statements is not necessarily correct?
(A) The number of red lights is equal to the number of blue lights
(B) The number of green lights is equal to the number of yellow lights
(C) The sum of the red and green lights is equal to the sum of the yellow and blue lights
(D) The sum of the red and blue lights is equal to the sum of the green and yellow lights
An increase in the base recombination of a BJT will increase
(A) the common emitter dc current gain β
(B) the breakdown voltage BVCEO
(C) the unity-gain cut-off frequency fT
(D) the transconductance gm

In CMOS technology, shallow P-well or N-well regions can be formed using
(A) low pressure chemical vapour deposition
(B) low energy sputtering
(C) low temperature dry oxidation
(D) low energy ion-implantation

In the differential amplifier shown in the figure, the magnitudes of the common-mode and differential-mode gains are Acm and Ad, respectively. If the resistance RE is increased, then
(A) Acm increases
(B) common-mode rejection ratio increases
(C) Ad increases
(D) common-mode rejection ratio decreases

The input-output relationship of a causal stable LTI system is given as
y n y n 1 x n [ ] = α − + β [ ] [ ]
If the impulse response h[n] of this system satisfies the condition n 0h n 2, [ ]
∞
Σ = =
the
relationship between α β and is
(A 1 / 2 ) α = − β (B 1 / 2 ) α = + β (C 2 ) α = β (D 2 ) α = − β
The trigonometric Fourier series of an even function does not have the
(A) dc term
(B) cosine terms
(C) sine terms
(D) odd harmonic terms

Drift current in semiconductors depends upon
(A) Only the electric field
(B) Only the carrier concentration gradient
(C) Both the electric field and the carrier concentration
(D) Both the electric field and the carrier concentration gradient