Electronics and Communication Engineering - Electromagnetic Field Theory

6.
Radiation resistance of half-wave dipole (λ/2) antenna is in free space
73 Ω
120 p
36.5 Ω
70 Ω
Answer: Option
Explanation:
No answer description is available. Let's discuss.

7.
The effect of the inductance of a coil on a constant direct current is that
it does not effect the constant direct current
it decreases the current
it strengthens the current
it causes a higher voltage drop
Answer: Option
Explanation:
No answer description is available. Let's discuss.

8.
If H = 0.1 sin (108p t + βλ) A/m for a plane wave propagating in free space, then the time average Poynting vector is
(0.6psin2 βy) w/m2
- 0.6p w/m2
1.2p w/m2
- 1.2p w/m2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

9.
The ratio of tangential component of electric field at the surface of a conductor and the linear current density resulting from this field is __________ impedance
characteristic
critical
surface
polarizing
Answer: Option
Explanation:
No answer description is available. Let's discuss.

10.
The gain of collinear arrays is maximum when the spacing between the elements is
0.1 λ to 0.3 λ
0.3 λ to 0.9 λ
0.5 λ to 0.7 λ
0.7 λ to 0.9 λ
Answer: Option
Explanation:
No answer description is available. Let's discuss.