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Question 1 to 5 carry One Mark each
Q.
According to the weather______it is going to be cloudly today
According to the weather forecast it is going to be cloudly today
In the following questions, a sentence has been given in direct/indirect speech.
She said, “Let them play”.
Select the pair that best express a relationship similar to the one expressed in the question pair:
Ostrich : Bird
A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has
been working it for 5 days and B for 7 days, C finishes it in 13 days. In how many days C alone will do the
work?
Question 6 to 10 carry Two Marks each
Q.
The sufficient condition for matrix ‘A’ to be diagonalizable is
If x = y^{a} , y = z^{b} and z = x^{c} then abc = ?
Out of the four alternatives suggested select the one which is correct
The value of X in the following figure is
The piechart shows the distribution of New York market share by volume of different computer companies
in 2005.
Number of units sold in 2005 in New York = 1,500
Value of units sold in 2005 in New York = US$ 16,50,000
For the year 2005, which company has realised the lowest average unit sales price for a PC ?
If for a 2 × 2 matrix a_{11} = a_{12} = a_{21} = 1 and a_{22} = –1. If the eigen values of A^{19} can be written in the
form then value of a × b is ________________
If X(t ) is random procoss defined as
X(t ) = A + Y (t ) where Y(t ) is zero mean random process and Autocorrelation function of X(t) is defined as
Value of C will be, If A, C are constant
Question 11 to 35 carry One Mark each
Q.
Value of a is ____________
i^{i }is of the form, where (i= sqrt {1})
6 boys and 6 girls sit in a row randomly. The probability that all the six girls sit together is in the form 1/a. Value of a is ______________.
The value of current I_{1} is
____________________
For a unity feedback system whose open  loop transfer function is the velocity error is _________________
First derivative of th e signal x(t ) will be
Which unit is adopted for magnit ude measurement in Bode plot s.
Aliasing occurs when sampling frequency ω_{s} where ω_{m} is message frequency?
Laplace transform analysis helps in
Which one is not an advant age of SSB over AM
In the common base stage of figure. I_{CQ} = 1mA and β = 7.5 T he input Resistance is
Magnetic field component of a plane wav e in a lossless dielectric is given as
wave is po larized in
A 20 MHz uniform plane wave propagate in lossy dielectric medium which amplit ude is reduced by 20%
aft er every meter traveled. Attenuation constant (Np/m) will be ______________
The figure shows a dependent current source.It
The Laplace transformation of e^{at} cosh(bt) is
The power factor for the circuit shown is
Consider the transistor circuit shown below
The average power dissipated for one cycle of operation is given by
Common Data Questi on s 29 to 30
Q.
Two amplifiers A and B are to be connectd in cascade. Find out the order in which the amplifiers must be connected to minimise the noise. Amplifiers A has noise factor of 1.5, gain of 10 dB and amplifier B has noise figure 2 dB, gain of 15 dB.
Determine the equivalent noise temperat ure of bot h the amplifiers assuming the reference temperature of
20°C and compare with that of cascaded amlifier.
Sol. T_{o} = 20 + 273 = 293
T_{e} = (F – 1)T o = (2.01 – 1) × 293 = 296 K
The JFET in the circuit shown in figure has I_{DSS} = 10 mA and V_{P} = –5V and the value of resistance.
R_{S} for drain current I_{DS} = 6.4 mA (nearest answer)
Consider the following model of a JFET amplifier
Here I_{DSS} = 8mA & V_{P} = –4V the value of V_{DS} will be
Content of memory location 2070H aft er executing instruction LDAX D is
For the shown circuit below the output volt age V_{o} is
A Si sample doped with 10^{18} /cm^{3} donar impurit y has a resistance of 10. T he sample has an area of
10^{–6} cm^{2} a length of 10 μm. T he doping efficiency of the sample is
Question 36 to 65 carry Two Marks each
Q.
The value of where R is the region in the first quadrant bounded by the curve y = x^{2} ,
y + x = 2 and x = 0.
_______________
For we have y = 1 at x = 0. By using Euler method and taking the step size 0.1. Find the value
of y at x = 0.4.
_________________
If x + y = k is normal to y^{2} = 12x, t hen k is ___________
Determ ine the ran ge of k such that fee dback cont rol system hav ing char acteristic equation
s ( s^{2} + s + 1) (s + 4) + k = 0 will be stable.
The solution of the differential equation,
Consider the circuit shown in figure
if 4R^{2}C = 3L, t he reson ance frequency ω_{o} is
What is the transfer funct ion whose approximate plot is shown in figure.
Corner frequenc ies ar e 2.5 an d 40 rad/sec
20 lo g k = 40 + 20 lo g 2 .5 = 47. 95
k = 250.
For a unity feedback system with G(s) = 10/s^{2}, what would be t he value of centroid
Signal x(t) shown below can be represented as
If memory chip size is 256 × 1 bits, the n umber of chips required for 1 KB memory is
The mininized version of logic circuit shown in figure below is
A man enters into tunnel with velocity v of width 7m and height 4 m and listen th e news through AM
radio signal. Whe n he travels in the tunnel, news spread about bad weather. Select t he correct opt ion
given below
Find the current I for the circuit shown below
Consider an AM system with additive thermal noise having a PSD η/2 = 10^{–12} W/MHz. Assuming that
baseband message signal x(t) has a bandwidth of 4 KHz and the amplitude distribution shown in figure below.
The signal is demodulated by envelope detection and appropriate post detect ion filtering assume M = 1. Find the minimum value of carrier amplitude Ac that will yield (S/No) 40 dB.
Three lossless quart er wave transformer is connected as shown in figure
Which is the necessary condition for no reflection at the input if
The Y parameter of the two port network shown below is
Consider a transistor circuit the value of
Consider a periodic signal x(t) shown below
It has Fourier ser ies representation
Choose the true statement.
x(t) is odd + halfwave symmetry.
So only odd terms will come in to the picture.
The electric field strength at distant point, P, due to a point charge, +q, located at the origin, is 100 µ V/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose center is at the origin, then the electric field strength at the point, P, outside the sphere, becomes
For particular. semiconductor material following parameter are observed.
hese parameters are independent of temperature the measure conductivit y of the intrinsic material is
The conductivit y at T = 500 K is
Two point charge 1 μC and 4 μC are placed at (–2, 1, 5) and (1, 3, –1) respectively. The energy stored
in the field will be (in mJ)
If maximum power transfer will take place in the circuit at then maximum power transfer to the
load will be
where Z_{L} = R + jX
Power spectral density of random process x(t) is shown in figure below. It consist of delta funct ion at f = 0
and triangular component . Mean square value of X(t ) is
Find C/R of system shown in figure below
Which of the following is correct signal space diagram (constellation diagram) for the unipolar return to zero code.
For the patterns shown in figure (i) and (ii) if the frequency applied to horizont al plate is 50 Hz t hen,
the frequencies of the vert ical plates will be respectively
A series RL circuit has a constant voltage ‘V’ applied at t = 0. A t what time V_{R} = V_{L}
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