# A numerical solution of the equation    can be obtained using Newton- Raphson method. If the starting value is x = 2 for the iteration, the value of x that is to be used in the next step is

1.  0.306

2.  0.739

3.  1.694

4.  2.306

4

2.306

Explanation :
No Explanation available for this question

# The electric and magnetic fields for a TEM wave of frequency 14 GHz in a homogeneous medium of relative permittivity εr and relative permeability μr = 1 are given by  ,    Assuming the speed of light in free space to be 3x108 m/s, the intrinsic impedance of free space to be 120p the relative permittivity εr of the medium and the electric field amplitude EP are

1.  εr =3, EP = 120p

2.  εr =3, EP = 360p

3.  εr =9, EP = 360p

4.  εr =9, EP = 120p

4

εr =9, EP = 120p

Explanation :
No Explanation available for this question

# A message signal m(t) = cos200πt + 4cos πt modulates the carrier c(t) = cos2π fct where fc = 1 MHZ to produce an AM signal. For demodulating the generated AM signal using an envelope detector, the time constant RC of the detector circuit should satisfy

1.  0.5 ms < RC < 1ms

2.  1μs

3.  RC

4.  RC >> 0.5 ms

4

1μs << RC < 0.5 ms

Explanation :
No Explanation available for this question

# The block diagram of a system with one input it and two outputs y1 and y2 given below A state space model of the above system in terms of the state vector

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Two systems H1(Z) and H2(Z) are connected in cascade as shown below. The overall output y(n) is the same as the input x(n) with a one unit delay. The transfer function of the second system H2(Z)

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# An 8085 assembly language program is given below. Assume that the carry flag is initially unset. The content of the accumulator after the execution of the program is MVI A,07H RLC MOV B,A RLC RLC ADD B RRC

1.  8CH

2.  64H

3.  23H

4.  15H

4

23H

Explanation :
No Explanation available for this question

# The first six points of the 8-point DFT of a real valued sequence are 5,1-j3,0,3-j4,0 and 3+j4. The last two points of the DFT are respectively

1.  0,1-j3

2.  0,1+j3

3.  1+j3,5

4.  1-j3,5

4

1+j3,5

Explanation :
No Explanation available for this question

# For the BJT QL in the circuit shown below ,β=∞ , VBEon=0.7v, VCEsat=0.7v. The switch is initially closed At time t=0 the switch is opened .The time t at which Q1 leaves the active region is

1.  10 ms

2.  25 ms

3.  50 ms

4.  100 ms

4

50 ms

Explanation :
No Explanation available for this question

# In the circuit shown below, the network N is described by the following Y matrix: the voltage gain v2/v1

1.  1/90

2.  -1/90

3.  -1/99

4.  -1/11

4

-1/11

Explanation :
No Explanation available for this question

# In the circuit shown below, the initial charge on the capacitor is 2.5 mC, with the voltage polarity as indicated. The switch is closed at time t=0. The current i(t) at a time t after the switch is closed is

1.  I(t)=15exp (-2*103t)A

2.  I(t)=5exp (-2×103t)A

3.  I(t)=10exp (-2×103t)A

4.  I(t)=5exp (-2×103t)A

4