Q.1.

The output of a Mealy system is 1 if there has been a pattern ofotherwiseThe minimum state for this system is :

Q.2.

Consider aPLL with RT =kΩ and CT = 0.μF. What is the output frequency of the VCO?

Q.3.

4 point DFT for x(n) = {-is

Q.4.

Which of the following transducers requires a high input impedance preamplifier for proper measurements?

Q.5.

With reference to C programming language, which of the following statements are correct?

  1. An identifier may start with an underscore.
  2. An identifier may end with an underscore.
  3. If is a valid identifier.
  4. The number of significant characters in and identifier is implementation dependent.
Select the correct answer from the codes given below:
Q.6.

Assertion (A): Ideal current sources and ideal voltage sources do not exist in reality.

Reason (R): All sources have finite internal impedances.

Q.7.

A signal occupies a band 5 kHz tokHz. For proper error free reconstruction at what rate it should be sampled?

Q.8.

By what name is the equation Δ . J = 0 frequency known?

Q.9.

Which of the following is true?

Q.10.

The output of a Mealy system is 1 if there has been a pattern ofotherwiseThe minimum state for this system is :

Q.11.

In a conventional AM superhetrodyne receivers, the detectors employed to extract intelligence include

Q.12.

Assertion (A): The h-parameter model of a BJT can be derived from its hybrid-p model and vice-versa.

Reason (R): The hybrid-p model has many more additional elements as compared to h-parameter model of the BJT.

Q.13.

Thin gate oxide in a CMOS process in preferably grown using

Q.14.

Consider the following statements, regarding an OP AMP:

  1. All types of negative feedback reduce non-linear distortion.
  2. All types of negative feedback reduce the output offset voltage.
  3. Non-inverting (current and voltage) feedback increases the input impedance.
  4. Inverting (current and voltage) feedback decreases input impedance.
Which of the above statements is/are correct?
Q.15.

Which one of the following is applicable to any network-linear or non-linear, active or passive, time-varying or invariant - as long as Kirchhoff laws are not violated?

Q.16.

Which of the following describe the correct properties of an emitter follower circuit?

  1. It is a voltage series feedback circuit.
  2. It is a current series feedback circuit.
  3. Its voltage gain in less than unity.
  4. Its output impedance is very low.
Select the correct answer from the codes given below:
Q.17.

An air-filled rectangular waveguide has dimensions 8cm x 10cm . The wavelength of waveguide at frequency 3 GHz

Q.18.

A surface charge density of 8 nc/m2 is present on a plane x = z. A line charge density ofnC/m is present on line x =y = 2 Find VAB for points A(and B(1)

Q.19.

The property not valid for basic singularity function is

Q.20.

Which of the following circuits come under the class of combinational logic circuits?

  1. Full adder
  2. Full subtractor
  3. Half adder
  4. J-K flip-flop
  5. Counter
Select the correct answer from the codes given below:
Q.21.

The multiplication of two n bit numbers gives a product of length less than or equal to

Q.22.

Consider the following statements:
The bias stability of an emitter-bias amplifier circuit improves by

  1. decreasing the value of RB
  2. increasing the value of RE
  3. decreasing the value of RB
  4. increasing the value of RB
  5. increasing the value of RC
Which of the above statements are correct?
Q.23.

Which of the following statements about the matched filter in a communication receiver are correct?

  1. Its impulse response depends on the signed shape
  2. It maximizes the SNR at the detection shape.
  3. It produces ISI.
  4. It may produce phase error if synchronization is improper.
Select the correct answer from the codes given below:
Q.24.

Which of the following devices is a 'hot-electron' diode?

Q.25.

Consider the following statements about a good power supply:

  1. The a.c. ripple should be high
  2. Sv, (Voltage stability factor) should be low
  3. ST, (Temperature stability factor) should be low
Which of the above statements are correct?
Q.26.

The input and output of a continuous time system are respectively denoted by x(t) and y(t) Which of the following descriptions corresponds to a causal system?

Q.27.

NMOS devices have __________ switching speeds and __________ on-state resistance; as compared with PMOS devices.

Q.28.

Which of the following is equivalent to x?

Q.29.

Consider the following statements:

  1. Internal sorting is used if the number of items to be sorted is very large.
  2. External sorting is used if the number of items to be sorted is vary large.
  3. External sorting needs auxiliary storage.
  4. Internal sorting needs auxiliary storage.
Which of the above statements are correct?
Q.30.

Consider the following:

  1. Si
  2. Ge
  3. GaAs
  4. InP
Which of the above semiconductors should be used for making highly efficient photodiodes?
Q.31.

The characteristic polynomial of a system is q(s) = 2s5 + s4 + 4s3 + 2s2 +The system is :

Q.32.

A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

Q.33.

A rectangular wave guide is designed to propagate at the dominant mode TE10 at a frequency of 5 GHz. The cut-off frequency is 0.8 of signal frequency. The ratio of the guide width to height isThe dimensions of the guide are

Q.34.

The fuse material used in electrical lines must have which one of the following properties?

Q.35.

Which of the following statements is not correct?

Q.36.

If D, G and η denote the directly, power gain and efficiency of an antenna, then which of the following relation holds :

Q.37.

If the potential functions V1 and V2 satisfy Laplace's equation within a closed region and assume the same values on its surface, then which of the following is correct?

Q.38.

Which one of the following statements is correct for MOSFETS?

Q.39.

Which of the following bridges is also used in an oscillator?

Q.40.

A lossless transmission line with air dielectric is 6 m long. what is the phase constant?

Q.41.

A memoryless source emits n symbols each with a probability p. The entropy of the source as a function of n

Q.42.

If there is phase error in the carrier signal for the detection of SSB signals, then

Q.43.

How many and which types of machine cycles are needed to execute PUSH PSW bymicroprocessor?

Q.44.

In a series LCR circuit the maximum inductor voltage is twice the maximum capacitor voltage however current lags byand drop across the inductance is vL =sin 377t V. Assuming the resistance beingΩ, Find the values of the capacitance and inductance.

Q.45.

Unit doublet is the Laplace inverse of __________ .

Q.46.

The Wheatstone bridge method of measuring resistance is ideally suited for the measurement of resistance values in the range of

Q.47.

Which device can detect the presence of both forward and backward waves in a waveguide?

Q.48.

The correct sequence of subsystems in an FM receiver is

Q.49.

Which of the following statements about the matched filter in a communication receiver are correct?

  1. Its impulse response depends on the signed shape
  2. It maximizes the SNR at the detection shape.
  3. It produces ISI.
  4. It may produce phase error if synchronization is improper.
Select the correct answer from the codes given below:
Q.50.

A DC voltage source is connected across a series R - L - C circuit. Under steady-state conditions, the applied DC voltage drops entirely across the