All India Electronics and Communication Engineering (ECE) Group

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

A MUX network is shown in fig.

Que: Z₂ = ?

• a)
  ab + bc + ca
• b)
  a + b + c
• c)
  abc
• d)
  

For the given input waveform to the given circuit, what is the minimum value of the output waveform?

• a)
  4 V
• b)
  16 V
• c)
  12 V
• d)
  0 V

• 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

Select a suitable figure from the four alternatives that would complete the figure matrix.

• a)
   

  1
• b)
   

  2
• c)
   

  3
• d)
  4

The MUX shown in fig. P4.2.31 is 4 * 1 multiplexer. The output Z is

• a)
  ABC
• b)
  
• c)
  
• d)
  

• a)
  10 μm
• b)
  20 μm
• c)
  30 μm
• d)
  40 μm

• a)
   

  1010 kHz
• b)
  1455 kHz
• c)
  1910 kHz
• d)
  545 kHz

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

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

• A:

  25

• B:

  125

• C:

  321

• D:

  345

The answer is b.

A circuit is given in fig. Find theThevenin equivalent as given in question.

As viewed from terminal y and y^' is

• a)
  8 V, 32 Ω
• b)
  4 V, 32 Ω
• c)
  5 V, 6 Ω
• d)
  7 V, 6 Ω

V_o = ?

 

• a)
  223 ∠-56⁰ V
• b)
  223 ∠56⁰ V
• c)
  124 ∠-154⁰V
• d)
  124 ∠154⁰V

The transfer function of given system is:

• a)
  
• b)
  
• c)
  
• d)
  

• a)
  1:4
• b)
  1:3
• c)
  1:2
• d)
  2:3

• a)
  both null matrices
• b)
  both identity matrices
• c)
  both square matrices of the same order
• d)
  None of these

What are the states of three ideal diodes of circuit shown below:

• a)
  D₁ ON, D₂ OFF, D₃ OFF
• b)
  D₁ OFF, D₂ ON, D₃ OFF
• c)
  D₁ ON, D₂ OFF, D₃ ON
• d)
  D₁ OFF, D₂ ON, D₃ ON

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

The sum of the eigenvalues of    is equal to 

• a)
  18
• b)
  15
• c)
  10 
• d)
  none of these

• a)
  current sources under certain bias conditions
• b)
  voltage sources under certain bias conditions
• c)
  inductors that can remove current spikes
• d)
  dependent current sources whose current is clipped by the load resistor value

Number of times the instruction sequence below will loop before coming out of loop is

• a)
  00
• b)
  01
• c)
  255
• d)
  256

The figure given below shows the Fourier spectra of signal x(t) and y(t).

The Nyquist sampling rate for x(t) y(t) is_________.

• a)
  250 kHz
• b)
  500 kHz
• c)
  50 kHz
• d)
  100 kHz

• a)
  1 kHz
• b)
  2 kHz
• c)
  4 kHz
• d)
  8 kHz

• a)
  1/2    
• b)
  2.20 x10^-5
• c)
  4.39 x10^-10    
• d)
  0.005

• a)
  34.29
• b)
  20.7
• c)
  32.27
• d)
  16.4

• a)
  0.168u_x + 0.915u_y + 0.367u_z
• b)
  0.729u_x + 0.134u_y - 0.672u_z
• c)
  0.729u_x + 0.134u_y + 0.672u_z
• d)
  0.168u_x + 0.915u_y - 0.367u_z

• a)
  8
• b)
  10
• c)
  9
• d)
  None of these

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

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

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

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

• 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)
  RQT
• b)
  QPV
• c)
  SPU
• d)
  FRT

The shape in the figure given below is folded to form a box. Choose from the alternatives (1), (2), (3) and (4), the boxes that are similar to the box formed from the shape below.

• a)
  (2) and (3) only
• b)
  (1), (3) and (4) only
• c)
  (2) and (4) only
• d)
  (1) and (4) only

Assuming zero initial condition, the response y(t) of the system given below to a unit step input u(t) is

• a)
  u(t)
• b)
  t.u(t)
• c)
  t²/2.u(t)
• d)
  e^-tu(t)

• a)
  
• b)
  
• c)
  
• d)
  

• a)
    0001
• b)
   0010
• c)
   1101
• d)
   Can not be expressed in 4 bit 2's complement

The trans conductance g_m of the transistor shown in figure is 10 mS. The value of the input resistance R_IN   seen by source is -

• a)
  10.0 kΩ
• b)
  8.3 kΩ
• c)
  5.0 kΩ
• d)
  2.5 kΩ

For the MOSFET shown in the figure, the threshold voltage  and  The value of  (in mA) is ___________.

• a)
  0.6
• b)
  0.7
• c)
  0.8
• d)
  0.9