Electronics and Communication Engineering (ECE)

• A:

  25

• B:

  125

• C:

  321

• D:

  345

The answer is b.

• a)
  − 200 ε₀
• b)
  − 200/ε₀
• c)
  200 ε₀
• d)
  − 240 ε₀

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  bandwidth of frequencies having output with in � 1 dB of the output at 1000 Hz
• b)
  bandwidth of frequencies having output with in � 3 dB of the output at 1000 Hz
• c)
  bandwidth of frequencies having output with in � 1 dB of the output at 500 Hz
• d)
  bandwidth of frequencies having output with in � 3 dB of the output at 500 Hz

• a)
  1/12
• b)
  12
• c)
  64/3
• d)
  16/3

• a)
  0
• b)
  1
• c)
  2
• d)
  3

• a)
  1
• b)
  2
• c)
  4
• d)
  8

• a)
  3.6 V
• b)
  9.8 V
• c)
  7.2 V
• d)
  12.3 V

• 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

In the given circuit, the moving-coil meter gives full-scale deflection reading when the average current
flowing through it is 1mA. The moving coil meter has internal resistance of 50?. Find the value of R that results meter a full scale deflection.

• a)
  9950?
• b)
  1566.5?
• c)
  3133?
• d)
  6266?

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

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  2x
• b)
  −2x
• c)
  2|x|
• d)
  None of these

• a)
  a and b
• b)
  b and c
• c)
  b, c, and d
• d)
  all

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

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)
  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)
  a
• b)
  b
• c)
  c
• d)
  d

Match the following

• a)
  (P,l), (Q,l) (R,2) (S,2)    
• b)
  (P,2), (Q,l) (R,l) (S,2)
• c)
  (P,l), (Q/2) (R,2) (S,l)    
• d)
  (P,l), (Q,2) (R,l) (S,2)

The 3-terminal linear voltage regulator is connected to a 10 ohm load resistor as shown in figure. If V_in is 10 volt, what is power dissipated in the Si transistor.

• a)
  0.6 W
• b)
  2.4 W
• c)
  4.2 W
• d)
  5.4 W

• a)
  3 ?
• b)
  4 ?
• c)
  5 ?
• d)
  6.67 ?

• a)
  
• b)
  
• c)
  R
• d)
  -R

• a)
  0
• b)
  1
• c)
  ∞
• d)
  -1

• a)
  Eddy current losses are higher
• b)
  Mass of moving system
  becomes higher
• c)
  The magnetic field produced by
  eddy currents introduce error
• d)
  Operating field is weak due to
  air cored.

• a)
  det(A) = 7
• b)
  det(A) = 81
• c)
  det(A) = 9
• d)
  det(A) = 4

• a)
  k = 1 or 2
• b)
  k = 2 or 3
• c)
  k = 0
• d)
  None of these

• a)
  Reference input
• b)
  Reference output
• c)
  Output and feedback signal
• d)
  Input and feedback signal

The Eigen values of the matrix 

• a)
  1, 1, 2
• b)
  1, 2, 2
• c)
  1, 2, 3
• d)
  None of these

If, then the value of L{tⁿ f(t)} is equal to

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  49.3 nF
• b)
  38.7 nF
• c)
  77.4 nF
• d)
  98.6 nF

• a)
  Zero initial condition
• b)
  Non-zero initial condition
• c)
  Zero final condition
• d)
  Non-zero final condition

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

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

• a)
  impartial
• b)
  argumentative
• c)
  separated
• d)
  hostile

• a)
  all probabilities are equal
• b)
  one of the probabilities equal to 1 and two others are zero
• c)
  the probabilities are 1/2, 1/4 and 1/2
• d)
  the two of the probabilities are 1/2 each and other zero

For what value of k is the following function continuous  x = 0

• a)
  k = 0
• b)
  k = 1/8
• c)
  k = 1
• d)
  k = 1/2

• a)
  18.4 V
• b)
   

  26.0 V
• c)
  2 V
• d)
  20 V

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

• a)
  -2 V,6/5Ω
• b)
  2 V,5/6Ω
• c)
  1 V,5/6Ω
• d)
  -1 V,6/5Ω

Choose the correct sequence :

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• a)
  50
• b)
  55
• c)
  54
• d)
  none of these

• A:

  3.0

• B:

  1.0

• C:

  11

• D:

  3.02

The answer is a.

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

• a)
  0.77 eV
• b)
  0.67 eV
• c)
  0.57 eV
• d)
  0.47 eV

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

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

• a)
  could have, been
• b)
  would have, being
• c)
  had, have
• d)
  had been, been

If wave form is given only for I period then

 

Q. Waveform x (t) is

 

• a)
  an even function with half wave symmetry.
• b)
  An odd function with half wave symmetry.
• c)
  an even function with no half wave symmetry.
• d)
  An odd function with no half wave symmetry.

• a)
  2
• b)
  1
• c)
  e^-1/2
• d)
  e

• a)
   eclipses
• b)
   dominates
• c)
   overshadows
• d)
   subdues

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

• a)
  
• b)
  
• c)
  
• d)
  

Consider a uniform rod of mass M and length L and an impulse J imparted to it at the  position 'P' shown. What would be its angular velocity ?

• a)
  
• b)
  
• c)
  
• d)
  

Match the list
 

List-I
Material used
A. Maganin
B. Aluminium
C. Phosphor Bronze
D. Eureka

List-II
Purpose
1. Multiplier
2. Coils
3. Discs
4. Control spring
5. Shunt

• a)
  a
• b)
  b
• c)
  c
• d)
  d

• 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)
  Both the P-region and the N-region are heavily doped
• b)
  The N-region is heavily doped compared to the P-region
• c)
  The P-region is heavily doped compared to the N-region
• d)
  An intrinsic silicon region is inserted between the P-region and the N-region

• a)
   8      
• b)
   6        
• c)
   8 m   
• d)
   6π

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

• a)
  e^-t u (t) A
• b)
  (1 - e^-t) u(t)  A
• c)
  u(t) A
• d)
  (2 - e^-t) u(t)  A

• a)
  4.36
• b)
  9.8
• c)
  19
• d)
  3.13

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

• a)
  100 Ω
• b)
  50 Ω
• c)
  25 Ω
• d)
  10 Ω

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 time
• b)
  10 times
• c)
  11 times
• d)
  infinite times

• 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

If saturation currents of 2 diodes are 1 µA and 2 µA.
If break down voltages of diode are same and are equal to 100 volt, what is value of current in D1.

Q.

If V = 90 volt

• a)
  0 µA
• b)
  1 µA
• c)
   1.5 µA
• d)
   2 µA    

• a)
  
• b)
  
• c)
  0.53 × 186 Å
• d)
  0.53 × (186)² Å

• a)
  20 rad/s
• b)
  20 Hz
• c)
  40 rad/s
• d)
  40 Hz