# The power Pt transmitted by an antenna is being received by another antenna at a distance r and at a power level Pr, Pr/Pt is (Dt and Dt represent the gains of the transmitting and the receiving antenna respectively)

1.  directly proportional to  DtDr

2.  directly proportional to Dr /Dt

3.  directly proportional to  Dt /Dr

4.  inversely proportional to(λ/4πr)2

4

directly proportional to  DtDr

Explanation :
No Explanation available for this question

# The phasor magnetic field intensity for a 400 M. uniform plane wave propagating in a certain lossless material is (6uy-j5uz)e-JBX A/m. The phase velocity is

1.  6.43. 106 m/s

2.  2.2 x 107 m/s

3.  1.4x108 m/s

4.  none of these

4

1.4x108 m/s

Explanation :
No Explanation available for this question

# The electric field of a uniform plane wave . free space is given by E8= 12π(uy+juz )e-j15x, The magnetic field phasor H6 is

1.  12/n0(-uz+juy )e-j15x

2.  12/n0(uz+juy )e-j15x

3.  12/n0(-uz-juy )e-j15x

4.  12/n0(uz-juy )e-j15x

4

12/n0(uz-juy )e-j15x

Explanation :
No Explanation available for this question

# A 60 m long aluminium (cσ= 3.5 x 107 S/m) pipe with inner and outer radii 9mm and 12 mm carries a total current of 16 sin (106πt).The effective resis.nce of the pipe is

1.  0.19Ω

2.  3.48Ω

3.  1.469Ω

4.  2.4Ω

4

0.19Ω

Explanation :
No Explanation available for this question

# In the given figure, spring constant is k, viscous friction coefficient is B, mass is M and the system output motions is x(t) corresponding to input force F(t). Which of the following parameters related to the above system 1. Time constant= 2. Damping coefficient= 3. Natural frequency of oscillation= Select the correct answer using the codes given below:

1.  1,2 and 3

2.  1 and 2

3.  2 and 3

4.  1 and 3

4

2 and 3

Explanation :
No Explanation available for this question

# The transfer function C/R of the system shown in the figure is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The transfer function of the system shown in the given figure is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The closed loop system shown in figure is subjected to a disturbance N(s). The transfer function is given by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# The transfer function C(s)/R(s)of the system, whose block diagram is given below is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4