# If X=√-1 then the value of Xx is

1.   E-x/2

2.  Ex/2

3.  x

4.  1

4

E-x/2

Explanation :
No Explanation available for this question

# Given   f(z)=  If C is a counter clock wise path in the z-plane such that  the value of    is

1.  -2

2.  -1

3.  1

4.  2

4

1

Explanation :
No Explanation available for this question

# In the circuit shown below, the current through the inductor is

1.

2.

3.

4.  0

4

Explanation :
No Explanation available for this question

# A system with transfer function    is excited by sin(ωt), the steady-state output of the system is zero at

4

Explanation :
No Explanation available for this question

# In the sum of product function f(X,Y,z)= ∑(2,3,4,5), the  prime implicants are

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# If x[n]= (1/3)|n|-(1/2)n u[n] , then the region of convergence (ROC) of its Z-transform in the Z-plane will be

1.  1/3

2.  1/3

3.  1/2

4.  1/3

4

1/2<|Z|<3

Explanation :
No Explanation available for this question

# The radiation pattern of an antenna in spherical co-ordinates is given by  F(θ)= COS4 θ; 0≤θ≤π/2  the directivity of the antenna is

1.  10db

2.  12.6 dB

3.  11.5dB

4.  18 dB

4

10db

Explanation :
No Explanation available for this question

# A coaxial cable with an inner diameter of 1mm and outer diameter of 2.4 mm is filled with a dielectric of relative permittivity 10.89 Given μ0= 4π*10-7  H/M   F/M the characteristic impedence of the cable is

1.  330

2.  100 ?

3.  143.3 ?

4.  43.4 ?

5.  none

5

none

Explanation :
No Explanation available for this question

# A source alphabet consist of N symbol with the probability of the first two symbols being the same. A source encoder increases the probability of the first symbol by a small amount ε and decreases that of the second by  ε After encoding, the entropy of the source

1.  increases

2.  remains the same

3.  increases only if N=2

4.  decreases

4

decreases

Explanation :
No Explanation available for this question

1.  Cos (ωt)-1

2.  Sin (ωt)

3.  1- Cos (ωt)

4.  1- Sin (ωt)

4