Electronics and Communication Engineering (ECE)

• a)
  50%
• b)
  78%
• c)
  100%
• d)
  25%

• a)
  f_c = 9

  N
• b)
  f_c = 81 N²
• c)
  f_c = 81 N
• d)
  

• a)
   She is smart enough to take care of herself in Bombay
• b)
   She is enough smart to take care of oneself in Bombay
• c)
   She is enough smart to take care of herself in Bombay
• d)
   She is smart enough to take care of oneself in Bombay

• a)
  its inability to handle analog signals.
• b)
  the high error rate which its quantizing noise introduces.
• c)
  its incompatibility with TDM.
• d)
  the large bandwidths that are required for it.

Which one of the following is a property of the solutions to the Laplace equation : 

• a)
  The solution have neither maxima nor minima anywhere except at the boundaries
• b)
  The solution are not separable in the coordinates
• c)
  The solution are not continuous
• d)
  The solution are not dependent on the boundary conditions

• a)
  (- 1)^k δ(k)                             
• b)
  δ(k) - (- 1)^k
• c)
  (-1)^k u(k)           
• d)
  u(k) - (- 1)^k

• a)
  hardware program
• b)
  source program
• c)
  object program
• d)
  both (a) and (c)

• a)
   The potential biases has disappeared
• b)
  No. of holes diffusing from P-side to N-side equals the no. of electrons diffusing from N-side to P-side
• c)
  Total current crossing Junction from P-side to N-side equals the total current crossing Junction from N-side top-side
• d)
  No carriers cross the Junction

 Match List-I (Combinational Circuits) with List-ll (Applications) and select the correct answer using the codes given below the lists:

List-I
A. Decoder
B. Multiplexer
C. Encoder
D. Demultiplexer

List-ll
1. Serial to parallel converter
2. Digital to analog converter
3. Parallel to serial converter
4. Analog to digital converter

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• a)
  
• b)
  
• c)
  
• d)
   None of these

• a)
   1 & 3
• b)
  2 & 4
• c)
  1, 3 & 4
• d)
  1,2,3 & 4

• a)
  Human progress and security are positively associated with environmental security
• b)
  Human progress is contradictory to environmental security.
• c)
  Human security is contradictory to environmental security.
• d)
  Human progress depends upon environmental security

• a)
  1.3 x 10^-7 s
• b)
  1.3 x 10^-4 s
• c)
  6.5 x 10^-8​ s
• d)
  6.5 x 10^-4​ s

In the circuit shown below, assume that the diodes D₁ and D₂ are ideal. The average value of voltage V_ab (in
volts) across the terminals a and b is

• a)
  2 Volt
• b)
  0 Volt
• c)
  -2 Volt
• d)
  4 Volt

• a)
  Equal to 1             
• b)
  Less than 1             
• c)
  Greater than 1         
• d)
  Equal to 5 ​

Consider the impedance matching series

Q.

The load impedance Z_L is given by

• a)
  200 n    
• b)
  100E2    
• c)
  70£2    
• d)
  60Q

• a)
  requested that
• b)
  should be give
• c)
  the driving test
• d)
  instead of tomorrow

• a)
  Both A and R are correct and R is the correct explanation of A
• b)
  Both A and R are correct and R is not the correct explanation of A
• c)
   A is true and R is false
• d)
  A is false and R is true

  along the straight line from 

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  83 mV
• b)
  59 mV
• c)
  43 mV
• d)
  31 mV

• a)
   0.5  
• b)
   0.6  
• c)
   0.7  
• d)
   None of these

Choose the correct sequence :

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• a)
  word organized
• b)
  byte organized
• c)
  nibble organized
• d)
  bit organized

• a)
  distance and ignorance
• b)
  language and cost
• c)
  distance and language
• d)
  distance and cost

• a)
  reciprocity theorem
• b)
  principle of maximum power transfer
• c)
  both (a) and (b)
• d)
  none of the above

• a)
  a
• b)
  b
• c)
  c
• d)
  d

A voltage having the laplace transform is applied across a 2H inductor having zero initial current What is the current in the inductor at t = ∞?

• a)
  zero    
• b)
  (1/5) A
• c)
  (2/7) A    
• d)
  (2/5) A

(Q.3-Q.5) Consider the amplifier below for the case V_DD = 5 V, R_D = 24 kΩ, (W/L) = 1 mA/V², and V_t = 1 V.

If the amplifier is biased to operate with an overdrive voltage V_OV of 0.5 V, find the incremental gain at the bias point.

• a)
  -3 V/V
• b)
  -6 V/V
• c)
   -9 V/V
• d)
  -12 V/V

• a)
  Synchronousdetector       
• b)
  Square law demodulator
• c)
  Envelope detector
• d)
  FM receiver

The pole-zero diagram of a causal and stable discrete-time system is shown in the figure. The
zero at the origin has multiplicity 4. The impulse response of the system is h[n]. If h[0] = 1,
we can conclude

• a)
  h[n] is real for all n
• b)
  h[n] is purely imaginary for all n
• c)
  h[n] is real for only even n
• d)
  h[n] is purely imaginary for only odd n

The solution of 

• a)
   y = Ae^−x + Be^4x + 3 x −4
• b)
   y = Ae^−x + Be^4x + 3 x +4
• c)
   y = Ae^−x + Be^−4x + 3x − 4
• d)
   None of these

• A:

  3.0

• B:

  1.0

• C:

  11

• D:

  3.02

The answer is a.

• a)
  aS²_g (ω) and a²P_g
• b)
  aS_g² (ω) and aP_g
• c)
  aS_g (ω) and a²P_g
• d)
  aS_g (ω) and aP_g

• a)
  2 x 10¹⁶ cm^-3
• b)
  4 x 10¹⁶ cm^-3
• c)
  2 x 10¹⁸ cm^-3
• d)
  4 x 10¹⁸ cm^-3

• a)
  
• b)
  exp (10s)
• c)
  
• d)
  exp (-10s)

Match List-I with List-ll and select the correct answer using the codes given below the lists:
List-I 
A. Immersion rod
B. Air conditioner
C. Automatic washing machine
D. Automatic control of traffic
List-ll
1. Open loop control system
2. Closed loop control system
3. Neither a closed loop nor an open loop system

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• a)
  TE₁₀ < TE₂₀ < TE₀₁ < TM₁₁
• b)
  TE₁₀ < TE_o1 < TE₂₀ < TM₁₁
• c)
  TE ₁₁ < TE₀₁ < TE₂₀ < TM ₁₀
• d)
  TE₀₁ < TE₁₀ < TE₂₀ < TM₁₁

• a)
  10111
• b)
  10011
• c)
  10110
• d)
  10010

Consider the following ‘3’ transfer functions.

Among these minimum phase system (s) i s/are

• a)
  1 and 2    
• b)
  1 and 3
• c)
  1 only    
• d)
  1,2 and 3