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Old May 25th, 2014, 05:03 PM
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Default Re: ECIL GET Exam Written test Paper

Here I am giving you question paper for GET written examination of Electronics Corporation of India Limited below

1.The current I in the given network.
a) 1A
b) 3A
c) 5A
d) 7A

2.For the Delta‐ Wye transformation in given figure, the value of the resistance R is.
a) 1/3 ohms
b) 2/3 ohms
c) 3/2 ohms
d) 3 ohms

3.In the given network, the Thevenin’s equivalent as seen by the load resistance Rl is
a) V=10 V, R= 2ohms
b) V=10V, R=3 ohms
c) V=15V, R= 2ohms
d) V=15V, R=3 ohms

4.The current I in a series R‐L circuit with R=10 ohms and L=20mH is given by i=2sin500t A. If v is the voltage across the R‐L combination then i
a) lags v by 45 degree
b) is in‐phase with v
c) leads v by 45
d) lags v by 90

5.In thr given network, the mesh current I and the input impedance seen by the 50 V source, respectively, are
a) 125/13 A and 11/8 ohms
b) 150/13 A and 13/8 ohms
c) 150/13 A and 11/8 ohms
d) 125/13 A and 13/8 ohms

6.A voltage sourcehaving a source impedance Z = R + jX can deliver maximum Average power to a load impedance Z, when
a) Z = R + jX
b) Z = R
c) Z = jX
d) Z = R –jX

7.In the given circuit, the switch S is closed at t=0. Assuming that there is no initial Charge in the capacitor, the current i(t) for t>0 is
a) V/R e^ (‐2t/RC)
b) V/R e^ (‐t/RC)
c) V/2R e^ (‐2t/RC)
d) V/2R e^ (‐t/RC)

8.For the circuit in given figure, if e(t) is a ramp signal, the steady state value of the Output voltage v(t) is
a) 0
b) LC
c) R/L
d) RC

9.For the series RLC circuit in given figure, if w=1000 rad/sec, then the current I (in Amperes) is
a) 2 ∟‐15
b) 2 ∟15
c) √2∟‐15
d) √2∟15

10.The Y‐parameter matrix (mA/V) of the two‐port given network is
a) [2 ‐1 ‐1 2]
b) [2 1 ‐1 2]
c) [1 ‐2 ‐1 2]
d) [2 1 1 2]

11.The maximum number of trees of the given graph is
a) 16
b) 25
c) 100
d) 125

12.Given figure shows a graph and one of its trees. Corresponding to the tree, the group of branches that CAN NOT constitute a fundamental cut set is
a) 1,2,3
b) 1,4,6,8,3
c) 5,6,8,3
d) 4,6,7,3

13.The Y‐parameter matrix of a network is given by Y=[1 1 ‐1 1] A/V. The Z11 parameter of the same network is
a) ½ ohms
b) 1/√2 ohms
c) 1 ohms
d) 2 ohms

14.For the given circuit, the switch was kept closed for a long time before opening it at t=0. The voltage v(0+) is
a) ‐10 V
b) ‐1 V
c) 0V
d) 10 V

15.The input impedance of a series RLC circuit operating at frequency W=√2w, w being the resonant frequency, is
a) R‐j(wL/√2) ohms
b) R+j(wL/√2) ohms
c) R‐j√2wL ohms
d) R‐j√2wL ohms

16.The threshold voltage V is negative for
a) an n‐channel enhancement MOSFET
b) an n‐channel depletion MOSFET
c) an p‐channel depletion MOSFET
d) an p‐channel JFET

17.At a given temperature, a semiconductor with intrinsic carrier concentration ni= 10 ^ 16 / m^3 is doped with a donor dopant of concentration Nd = 10 ^ 26 /m^3. Temperature remaining the same, the hole concentration in the doped semiconductor is
a) 10 ^ 26 /m^3
b) 10 ^ 16 /m^3
c) 10 ^ 14 /m^3
d) 10 ^ 6 /m^3}

18.At room temperature, the diffusion and drift constants for holes in a P‐type semiconductor
were measured to be Dp = 10 cm^2/s and µp = 1200 cm^2/V‐s, respectively. If the diffusion constant of electrons in an N‐type semiconductor at the same temperature is Dn = 20 cm^2/s, the drift constant for electrons in it is
a) µn = 2400 cm^2/V‐s
b) µn = 1200 cm^2/V‐s
c) µn = 1000 cm^2/V‐s
d) µn = 600 cm^2/V‐s

19.A common LED is made up of
a) intrinsic semiconductor
b) direct semiconductor
c) degenerate semiconductor
d) indirect semiconductor

20.When operating as a voltage regulator, the breakdown in a Zener diode occurs due to the
a) tunneling effect
b) avalanche breakdown
c) impact ionization
d) excess heating of the junction.

21.If the common base DC current gain of a BJT is 0.98, its common emitter DC current gain is
a) 51
b) 49
c) 1
d) 0.02

22.Negative resistance characteristics is exhibited by a
a) Zener diode
b) Schottky diode
c) photo diode
d) Tunnel diode

23.Let En and Ep, respectively, represent the effective Fermi levels for electrons and holes during current conduction in a semiconductor. For lasing to occur in a P‐N junction of band‐gap energy 1.2 eV, (En ‐ Ep) should be
a) greater than 1.2eV
b) less than 1.2eV
c) equal to 1.1eV
d) equal to 0.7eV

24.In a P‐well fabrication process, the substrate is
a) N‐type semiconductor and is used to build P‐channel MOSFET
b) P‐type semiconductor and is used to build P‐channel MOSFET
c) N‐type semiconductor and is used to build N‐channel MOSFET
d) P‐type semiconductor and is used to build N‐channel MOSFET

25.In a MOS capacitor with n‐type silicon substrate, the Fermi potential ¢ = ‐0.41 V and the flat‐band voltage Vfb = 0V. The value of the threshold voltage Vt is
a) ‐0.82 V
b) ‐0.41 V
c) 0.41 V
d) 0.82
Refer given figure for question 26 and 27. Assume D1 and D2 to be ideal diodes.

26.Which one of the following statements is true?
a) Both D1 and D2 are ON.
b) Both D1 and D2 are OFF.
c) D1 is ON and D2 is OFF.
d) D2 is ON and D1 is OFF.

27.Values of Vo and I, respectively, are
a) 2V and 1.1 mA
b) 0V and 0 mA
c) ‐2V and 0.7 mA
d) 4V and 1.3 mA

28.In a BJT CASCODE pair, a
a) common emitter follows a common base
b) common base follows a common collector
c) common collector follows a common base
d) common base follows a common emitter

29.Inside a 741 op‐amp, the last functional block is a
a) differential amplifier
b) level shifter
c) class‐A power amplifier
d) class‐AB power amplifier

30.For the MOSFET in the given circuit, the threshold voltage Vt = 0.5V, the process parameter KP = 150 µA/V^2 and W/L = 10. The values of Vd and Id, respectively, are
a) Vd = 4.5 V and Id = 1 mA
b) Vd = 4.5 V and Id = 0.5 mA
c) Vd = 4.8 V and Id = 0.4 mA
d) Vd = 6 V and Id = 0 mA

31.A negative feedback is applied to an amplifier with the feedback voltage proportional to the output current. This feedback increases the
a) input impedance of the amplifier
b) output impedance of the amplifier
c) distortion in the amplifier
d) gain of the amplifier

32.The early effect in a BJT is modeled by the small signal parameter
a) r0
b) r∏
c) gm
d) β

33.For a given filter order, which one of the following type of filters has the least amount of ripple both in pass‐band and stop‐band?
a) Chebyshev type I
b) Bessel
c) Chebyshev type II
d) Elliptic

34.For a practical feedback circuit to have sustained oscillation, the most appropriate value of the loop gain T is
a) 1
b) ‐1
c) ‐1.02
d) 1.02

35.Assume the op‐amps in given figure to be ideal. If the input signal vi is a sinusoid of 2V peak‐to‐peak and with zero DC component, the output signal vo is a
a) sine wave
b) square wave
c) pulse train
d) triangular wave

36.In a common source amplifier, the mid‐band voltage gain is 40 dB and the upper cutoff frequency is 150kHz. Assuming single pole approximation for the amplifier the unity gain frequency fT is
a) 6 MHz
b) 15 MHz
c) 150 MHz
d) 1.5 GHz

37.An op‐amp is ideal except for finite gain and CMRR. Given the open loop differential gain Ad=2000,CMRR = 1000, the input to the noninverting terminal is 5.002 V and the input to the inverting terminal is 4.999 V, the output voltage of the op‐amp is
a) 14 V
b) 24 V
c) ‐6 V
d) ‐8 V

38.The op‐amp in the circuit in given figure has a non‐zero DC offset. The steady state value of the output voltage Vo is
a) –RC dvs(t)/ dt
b) – (1/RC)|vs(t)dt
c) –V
d) +V

39.For the circuit in given figure, if the value of the capacitor C is doubled, the duty‐cycle of the output waveform Vo
a) increases by a factor of 2
b) increases by a factor of 1.44
c) remains constant
d) decreases by a factor of 1.44

40.Assume the op‐amp in the given circuit to be ideal. The value of the output voltage Vo is
a) 3.2 Vi
b) 4 Vi
c) 9 Vi
d) 10 Vi

41.The complement of the Boolean expression F = (X + Yˉ + Z)(Xˉ + Zˉ)(X + Y) is
a) XYZ+XZˉ+YˉZ
b) XˉYZˉ+XZ+XˉYˉ
c) XˉYZˉ+XZ+YZ
d) XYZ+XˉYˉ

42.The Boolean function F(A,B,C,D) = ∑(0,6,8,13,14) with don’t care conditions d(A,B,C,D) = ∑(2,4,10) can be simplified to
a) F = BˉDˉ+CDˉ+ABCˉ
b) F = BˉDˉ+CDˉ+ABCˉD
c) F = ABˉDˉ+CDˉ+ABCˉ
d) F = BˉDˉ+CDˉ+ABCD

43.The Boolean function F = AˉDˉ+BˉD can be realized by one of the following figures
44. For the multiplexer in given figure, the Boolean expression for the output Y is
a) AˉBˉ+BˉCˉ+AC
b) ABˉ+BˉCˉ+ACˉ
c) ABˉ+BˉC+AC
d) AˉBˉ+BˉC+AˉC

45. Which one of the following is TRUE?
a) Both latch and flip‐flop are edge triggered.
b) A latch is level triggered and a flip‐flop is edge triggered.
c) A latch is edge triggered and a flip‐flop is level triggered.
d) Both latch and flip‐flop are level triggered.

46. In a schottky TTL gate, the Schottky diode
a) increases the propagation delay
b) increases the power consumption
c) prevents saturation of the output transistor
d) keeps the transistor in cutoff region

47. For which one of the following ultraviolet light is used to erase the stored contents
a) PROM
b) EPROM
c) EEPROM
d) PLA

48. Which one of the following is NOT a synchronous counter
a) Johnson counter
b) Ring counter
c) Ripple counter
d) Up‐down counter

49. In 8085 microprocessor, the accumulator is a
a) 4 bit register
b) 8 bit register
c) 16 bit register
d) 32 bit register

50. In the register indirect addressing mode of 8085 microprocessor, data is stored a) at the address contained in the register pair
b) in the register pair
c) in the accumulator
d) in a fixed location of the memory

51. The output w[n] of the system shown in given figure is
a) x[n]
b) x[n‐1]
c) x[n] – x[n‐1]
d) 0.5(x[n‐1] + x[n])

52. Which one of the following is a periodic signal
a) x(t) = 2 e^j(t+(π/4))
b) x[n] = u[n] + u[‐n]
c) x[n] = ∑{∂[n‐4k]‐∂[n‐1‐4k]} where k = ‐∞to ∞
d) x(t) = e^ (‐1+j)t

53. If the input‐output relation of a system is y(t) = ∫x(t) dt where t = ‐∞ to 2t
a) linear, time‐invariant and unstable
b) linear, non‐causal and unstable
c) linear, causal and time invariant
d) non‐causal, time invariant and unstable

54. Which one of the can be the magnitude of the transfer function | H(jw) | of a causal system

55. Consider the function H(jw) = H1(w) + jH2(w), where H1(w) is an odd function and H2(w) is an even function. The inverse Fourier transform of H(jw) is
a) a real and odd function b) a complex function
c) a purely imaginary function
d) a purely imaginary and odd function
56. The laplace transform of given signal is
a) –A((1‐e^cs)/s)
b) A((1‐e^cs)/s)
c) A((1‐e^‐cs)/s)
d) –A((1‐e^‐cs)/s)
57. If X(z) is the z‐transform of x[n] = (1/2)^ |n|, the ROC of X(z) is
a) |z| > 2
b) |z| < 2
c) 0.5<|z|<2

d) the entire z‐plane
58. In a linear phase system, τg the group delay and τp the phase delay are
a) constant and equal to each other
b) τg is a constant and τp is proportional to w
c) a constant and τg is proportional to w
d) τg is proportional to w and τp is proportional to w

59. A signal m(t), band‐limited to a maximum frequency of 20 kHz is sampled at a frequency fs kHz to generate s(t). An ideal low pass filter having cut‐off frequency 37 kHz is used to reconstruct m(t) from s(t). The maximum value of fs required to reconstruct m(t) without distortion is
a) 20 kHz
b) 40kHz
c) 57 kHz
d) 77 kHz

60. If the signal x(t) shown in given figure is fed to an LTI system having impulse response h(t) as shown in given figure, the value of the DC component present in the output y(t) is
a) 1
b) 2
c) 3
d) 4

61. The characteristic equation of an LTI system is given as s^3 + Ks^2 + 5s + 10. When the system is marginally stable, the value of K and the sustained oscillation frequency w, respectively, are
a) 2 and 5
b) 0.5 and √5
c) 0.5 and 5
d) 2 and √5

62. The time required for the response of a linear time‐variant system to reach half the final value for the first time is
a) delay time
b) peak time
c) rise time
d) decay time

63. The signal flow graph of the given network is

64. Let c(t) be the unit step response of a system with transfer function K(s+a)/(s+K). If c(0+)=2 and c(∞)=10, then the values of a and K, respectively, are
a) 2 and 10
b) ‐2 and 10
c) 10 and 2
d) 2 and ‐10

65. The loop transfer function of an LTI system is G(s)H(s)= K(s+1)(s+5) / s(s+2)(s+3). For K>0, the point on the real axis that DOES NOT belong to the root locus of the system is
a) ‐0.5
b) ‐2.5
c) ‐3.5
d) ‐5.5

66. The state space equation of the circuit shown in given figure for x1=v0, x2=I is

67. The open loop gain of a unity feedback system is G(s)=wn^2 / s(s+2wn). The unit step response c(t)
of the system is

69. The angles of the asymptotes of the root loci of the equation s^3 + 5s^2 + (K+2)s + K = 0, for
0<=K<∞, are
a) 0 and 270
b) 0 and 180
c) 90 and 270
d) 90 and 180

70. The bode plot corresponding to a proportional derivative controller is the one shown in given figure

71. In frequency modulation, the instantaneous
a) amplitude of the carrier signal is varied with the instantaneous amplitude of the message signal
b) amplitude of the carrier signal is varied with the instantaneous frequency of the message signal
c) frequency of the carrier signal is varied with the instantaneous amplitude of the message signal
d) frequency of the carrier signal is varied with the instantaneous frequency of the message signal

72. If X is a zero mean Gaussian random variable, then P{X<=0} is
a) 0
b) 0.25
c) 0.5
d) 1

73. If a single‐tone amplitude modulated signal at a modulation depth of 100% transmits a total power of 15W, the power in the carrier component is
a) 5W
b) 10W
c) 12W
d) 15W

74. In a superheterodyne receiver, rejection of the image signal can be achieved by using a
a) higher local oscillatorn frequency
b) crystal oscillator
c) narrow band IF filter
d) narrow band filter at RF stage

75. The number of bbits per sample of a PCM system depends upon the
a) sampler type
b) quantizer type
c) number of levels of the quantizer
d) sampling rate

76. Which one of the following is used for the detection of AM‐DSB‐SC signal
a) Ratio detector
b) Foster‐Seeley discriminator
c) Product demodulator
d) Balanced‐slpoe detector

77. Which one of the following signal pairs can represent a BPSK signal
a) A cos2πfct, A sinπfct
b) A cos2πfct, ‐ A sinπfct
c) ‐ A cos2πfct, A sinπfct
d) A sin2πfct, A cosπfct

78. Which one of the following can be used for the detection of the noncoherent BPSK signal
a) matched filter
b) phase‐locked loop
c) envelope detector
d) product demodulator

79. Bits of duration Tb are to be transmitted using a BPSK modulation with a carrier of frequency Fc Hz. The power spectral density of the transmitted signal has the first null at the normalized frequency
a) |F – Fc|Tb = 0
b) |F – Fc|Tb = 1
c) |F – Fc|Tb = 2
d) |F – Fc|Tb = 4

80. The probability of bit error of a BPSK modulation scheme, with transmitted signal energy per bit Eb, in an additive white Gaussian noise channel having one‐sided power spectral density N0, is
a) (1/2) erfc(Eb/2N0)
b) (1/2) erfc√(Eb/2N0)
c) (1/2) erfc(Eb/N0)
d) (1/2) erfc√ (Eb/N0)

81. For a given transmitted pulse p(t), 0<=t<=T, the impulse response of a filter matched to the received signal is
a) –p(t‐T), 0<=t<=T
b) –p(T‐t), 0<=t<=T
c) p(t‐T), 0<=t<=T
d) p(T‐t), 0<=t<=T

82. The multiple access communication scheme in which each user is allocated the full available channel spectrum for a specified duration of time is known as
a) CDMA
b) FDMA
c) TDMA
d) MC‐CDMA

83. GSM system uses TDMA with
a) 32 users per channel
b) 16 users per channel
c) 8 users per channel
d) 4 users per channel

84. If Rx(τ) is the auto‐correlation function of a zero‐mean wide‐sense stationary random process X, then which one of the following is NOT true?
a) Rx(τ) = Rx(‐τ)
b) Rx(τ) = ‐Rx(‐τ)
c) σx^2 = Rx(0)
d) |Rx(τ)| <=Rx(0)

85. If E denotes the expectation operator, then E[X‐EX]^3 of a random variable X is
a) EX^3 – E^3X
b) EX^3 + 2E^3X – 3EX Ex^2
c) 3EX^3 – E^3X
d) 2EX^3 + E^3X – 3EX EX^2

86. A discrete memoryless source produces symbols m1,m2,m3 and m4 with probabilities 1/2, 1/4 , 1/8 and 1/8, respectively. The entropy of the source is
a) ¼
b) 1
c) 7/4
d) 2

87. A channel has a signal‐to‐noise ratio of 63 and bandwidth of 1200 Hz. The maximum data rate that can be sent through the channel with arbitrary low probability of error is
a) 600 bps
b) 1200 bps
c) 4800 bps
d) 7200 bps

88. For the vectors A = X ax + Y ay and B = Z az, del . (A X B) is
a) 0
b) 1
c) XZ
d) YZ

89. Which one of the following relations represents Strokes’ theorem (symbols have their usual meaning)?
a) ∫s del X A.ds = 0
b) ∫L A.dl = ∫s del X A.ds
c) ∫s A X dS = ‐∫v (del X A)dv
d) ∫v del.Adv = ∫s A.ds

90. Which one of the following relations is not correct (symbols have their usual meaning)?
a) del X E = ‐ ∂B/∂t
b) del X H = J + ∂E/∂t
c) del.D = ρv
d) del.B = 0

91. The electric field component of a uniform plane wave propagating in a lossless magnetic dielectric medium is given by E(t,z)=ax 5cos(10^9 t – 20/3 z)V/m. If η0 represents the intrinsic impedance of the free space, the corresponding magnetic field component is given by
a) H(t,z)= ay 5/2 η0 cos(10^9t – 20/3 z)A/m
b) H(t,z)= ay 10/ η0 cos(10^9t – 20/3 z)A/m
c) H(t,z)= az 5/2 η0 cos(10^9t – 20/3 z)A/m
d) H(t,z)= az 10/ η0 cos(10^9t – 20/3 z)A/m

92. The skin depth of a non‐magnetic conducting material at 100 MHz is 0.15 mm. The distance which a plane wave of frequency 10 GHz travels in this material before its amplitude reduces by a factor of e^‐1 is
a) 0.0015 mm
b) 0.015 mm
c) 0.15 mm
d) 1.5 mm

93. A lossless transmission line has a characteristic impedance of 100 ohms and an inductance per unit length of 1 μH/m. If the line is operated at 1 GHz, the propagation constant β is
a) 2π rad/m
b) 20π/3 rad/m
c) 20π rad/m
d) 2π *10^5 rad/m

94. When a load resistance Rl is connected to a lossless transmission line of characteristic impedance 75 ohms, it results in a VSWR of 2. The load resistance is
a) 100 ohms
b) 75√2 ohms
c) 120 ohms
d) 150 ohms

95. A two‐port network characterized by the S‐parameter matrix, [S] = [0.3 L0 0.9 L90 0.9 L90 0.2 L0] Is
a) both reciprocal and lossless
b) reciprocal, but not lossless
c) lossless, but not reciprocal
d) neither reciprocal nor lossless

96. A lossless air filled rectangular waveguide has internal dimensions of a cm * b cm. If a=2b and the cutoff frequency of the TE02 mode is 12 GHz, the cutoff frequency of the dominant mode is
a) 1 GHz
b) 3 GHz
c) 6 GHz
d) 9 GHz

97. A Hertzian dipole antenna is placed at the origin of a coordinate system and it is oriented along z‐axis. In which one of the following planes the radiation pattern of the antenna has a circular shape?
a) x=0
b) y=0
c) z=0
d) ø=45

98. Which one of the following statements is not true?
a) Antenna losses are taken into account in calculating its power gain
b) For an antenna which does not dissipate any power, the directive gain and the power gain are equal c) Directivity of an antenna is the maximum value of its directive gain
d) The directive gain of a Hertzian dipole is same in all direction

99. The directivity of a half dipole antenna is
a) 1.0
b) 1.5
c) 1.64
d) 2

100. Which one of the following is not true for a step index optical fibre?
a) It can support multiple modes
b) HE11 mode is its lowest order mode
c) The refractive index of the cladding is higher than that of the core
d) At a given wavelength, single mode operation is possible by proper choice of core diameter, core and cladding refractive indices.
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  #3  
Old January 23rd, 2015, 05:14 PM
Super Moderator
 
Join Date: Nov 2011
Default Re: ECIL GET Exam Written test Paper

Hello friend as you want the ECIL GET Exam Written test Paper so here I am providing you the same……

ECIL GET Exam Written test Paper :
1) Isotopes have _____?
a) unequal protons b) unequal electrons c) equal electrons and unequal neutrons d) none

2) Which of the following have least ripple factor?
a) Half wave rectifier b) Fullwave rectifier c) Bridge rectifier d) Transformer tuned rectifier

3) Which of the following has nonlinear output?
a) Differentiator b) Integrator c) mixer d) Class A amplifier

4) What is the gray code for 5?

5) Unambigious range when PRF=2KHZ is ___ ?

6) Phase sensitive demodulators is used in instruments___?
a) To measure phase angle between two AC signals b) AM demodulators c) PM demodulators d) None

7) In a transmission line maximum power is delivered to load when standing wave ratio is ____?
a) 1:1 b) 2:1 c) 1:2 d) 1:sqrt (2)

8) To design a 16KB memory system using chips having 12 address lines and 4 data lines, the number of such chips required_______?
a) 1 b) 2 c) 3 d) 4

9) A 1mw signal is attenuated at the rate of 5dB/1000ft. What is the power level into receiver that is 6000ft from signal source_____?
a) -10dBm b) -20dBm c) -30dBm d) -6dBm

10) Dominant form of distortion in simple Push-Pull Amplifier____?

11) When the transmissionline is lossless relation between R,L,G and C---?

12) v(t)=2sin(2000wt)+0.3cos(4000piet)+0.1 find sampling frequency____?

13) At what condition gain of feedback system =(1/B)___?
a) AB<<1 b) AB>>1 c) B>>1 d) A>>1

14) RAID configuration of disks are used to provide___?

15) To store a floating point number, in a computer system, having 16-bit mantissa and 8-bit exponent(each in 2's complement) what are the smallest and largest positive values which can be stored___?

16) Semaphores are used for___?

17) For a 13-bit DAC(0-10v) when a binary input increased by 1 output(V0) increases by ____?

18) For a coaxial cable Z0(charecteristic impedance)=75ohms, (load impedance)ZL=75ohms and connected source is 10V DC then V0(output)=___?

19) Rise time =2*10^(-7) find bandwidth==?

20) Rise time for 1st order system when 1v input is 1second and for 2v input is ___?

21) X(t) is the input function and h(t) is the impuse response for the system, then output can be found using____?

22) (Z)^-1 represents___?

23) A source 10Sqrt(2) sin(wt) having internal resistance 10+40i is connected with a load 10-40i, find the optimum power delivered to the load___?

24) Two voltages sources 0f 1.5v having internal resistances each 0.3ohm and 0.6ohm are connected in parallel. A 0.8ohm is connected accross the combination, find the heat generated___?

25) Four easy questions on OPAMP circuits----!(on schmitt trigger, Integrator, find Zin)

26) Given UV light frequency and asked frequency____?

27) In a meadium having Er=2 and Ur=2(Relative permitivity and relative permiability) find the velocity of the wave____?

28) A question on Zenor diode (asked max and min load currents)?


1. RAID is used for.

2. For parabolic antenna diameter and operating freq are given then find HPBW.

3. A sample and hold ckt is given in enhancement mode of mosfet then find hold error.

4. Find noise margin in terms of Voh(max,min) and V ih(max,min).

5. For a LTI system rise time is given at 1v then find it at 2v.

6. For a LTI system rise time is given for unit impulse input then find corresponding 3db bandwidth.

7. PC and SP contenting value given. then for a given subroutine what will be the value of SP.

8. Which rectifier having min ripple factor. (Four options given)

9. What will be the condition for gain of the feedback sys is 1/B (4 diff condition given).

10. Simple Program me of C is given then find result.

11. Simple program me is given then check any error or not.

12. For a LTI input x(t) and impulse signal h(t) is given then find the o/p.

13. Convert 5 in gray code.

14. To find unambiguous range if PRF of the RADAR is given.

15. If a 13 bit ADC (0-10v ) input is increase by 1 bit Then what will be change in o/p.

16. R,L,G,C relation for loss less.

17. Given 4096.6750 convert it into binary.

18. Which of the option is not true for Boolean algebra. (4 options given)

19. What will be the ratio for optimum power use.(1:1)

20. One K-map is given using don't care condition, minimize it.

21. In CRO vertical plate getting ac signal i/p where horizontal remains idle, what will display on screen.

22. Four T.F is given then check for critically damped.

23. In a co-axial line Zo, Zl and i/p 10v given then find o/p.

24. Z inverse stands for?

25. Signal attenuation rate is given 5db/1000ft then find attenuation after 5000ft dist.

26. Question given on De morgons law.

27. In a zener diode knee current and two parameter voltage given then find Max and Min current decicipation.

28. For a ckt having two cell given its internal resistance and an i/p voltage is given then find power dicipation across the ckt.

29. Which type of distortion is preferred for making small signal push pull amplifier (Cross over distortion)

30. A logic ckt having x-or ckt given then find o/p.

1) RS485 is which type of connector
a) Single end, multipoint b) Diffrential, multipoint c) Multipoint, diffrential

2) What is main advantage of I/omapped over memory mapped?
a)more addressing modes b)provides more buses c)

3) In 8086 for wait state which command is used?
a) ready b) hold c) intr

4)There were 4 questions fromOPAMP

5) If a lissajous pattern is observed ina circle and one waveform is horizontal 20 sin 100t and vertical one is 20 sin(100t+q) than what is value of angle q.
a) 90 b) 60 c) 0

6) Which gate is used for parity generation and checking?
a) EXOR b) NOR c) NAND

Syllabus of ECIL GET Exam (ECE)

Networks

Network graphs
Fundamental circuit matrices
Solution methods: nodal and mesh analysis
Network theorems
Thevenin and Norton’s maximum power transfer
Superposition
Wye-Delta transformation
Steady state sinusoidal analysis
Linear constant coefficient differential equations
RLC circuits
Time domain analysis
Frequency domain analysis
Solution of network equations using Laplace transforms
State equations for networks

Electronic Devices

Energy bands in silicon (Intrinsic and extrinsic silicon)
Carrier transport in silicon
Diffusion Current
Drift Current
Mobility
Resistance
Generation and recombination of carriers
Diodes
P-N Junction Diode
Zener Diode
Tunnel Diode
LED
Avalanche Photo Diode
Transistor
BJT
JFET
MOSFET
Basics of Lasers
MOS Capacitor
Industrial Electronics
Integrated circuits fabrication process
Oxidation
Diffusion
Ion implantation
Photolithography
n-tub process
p-tub process
Twin-tub CMOS process.

Analog Circuits

Small Signal Analysis
Diode Circuits
Clipping
Clamping
Rectifier
Biasing
Amplifiers
Single-And Multi-Stage
Simple op-amp circuits
Differential and Operational
Feedback Amplifier
Power Amplifier
Frequency response of amplifiers
Sinusoidal oscillators
Filters
Function generators and wave-shaping circuits
555 Timers
Power supplies

Digital circuits

Boolean Algebra
Digital IC Families (DTL TTL ECL MOS CMOS)
Minimization of Boolean Functions
Logic Gates
Combinatorial circuits
Code Converters
Multiplexers
Arithmetic Circuits
Decoders
PROM
Sequential circuits
Latches and Flip-Flops
Counters
Shift-Registers
Semiconductor memories
Microprocessor (8085)
Architecture
Programming
Memory
I/O Interfacing

Signals and Systems

Fourier series
Fourier Transform
DFT and FFT
Z-transform
Sampling theorem
Linear Time-Invariant (LTI) Systems
Signal transmission through LTI systems

Control Systems

Open loop and closed loop (feedback) systems
Signal flow graphs
Transient and steady state analysis of LTI control systems and frequency response
Tools and techniques for LTI control system analysis
Bode and Nyquist plots
Root loci
Routh-Hurwitz criterion
Control system compensators

Communications

Random signals and noise
Probability Random Variables
Probability Density Function
Autocorrelation
Power Spectral Density
Analog communication systems
Elements of hardware
Signal-To-Noise Ratio (SNR)
Calculations for Amplitude Modulation (AM)
Calculations for Frequency Modulation (FM)
Information theory
Channel capacity theorem
Digital communication systems
Pulse Code Modulation (PCM)
Differential Pulse Code Modulation (DPCM)
Digital Modulation Schemes
Amplitude Shift Keying
Phase Shift Keying
Frequency Shift Keying
Basics of TDMA FDMA, CDMA, and GSM

Electro-magnetics

Elements of vector calculus- Divergence, Curl
Gauss and Stokes’ theorems
Maxwell’s equations- Differential, Integral Forms
Wave equation Poynting vector
Plane waves
Propagation through Various Media
Reflection
Refraction
Phase and Group Velocity
Skin Depth
Transmission Lines
Characteristic Impedance
Impedance Transformation
Smith Chart
Impedance Matching
S Parameters Pulse Excitation
Waveguides
Modes in Rectangular Waveguides
Boundary Conditions
Cut-Off Frequencies
Dispersion Relations
Basics of Propagation in Dielectric Waveguide and Optical Fibers
Basics of Antennas
Dipole Antennas
Radiation Pattern
Antenna Gain
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