Electronics and Communication Engineering - Electromagnetic Field Theory

11.
It is desired to reduce the reflection at an air porcelain by use of 7/4 plate (for Porcelain μ = 40, and εr = 7). The thickness of the polystyrene plate required at 10 GHz will be
5.039 cm
50.39 cm
0.5039 cm
0.05039 cm
Answer: Option
Explanation:
No answer description is available. Let's discuss.

12.
Which of the following statement is false?
A half-wave dipole is a resonant antenna
A horizontal antenna transmits radio signal with horizontal polarization
The field strength of 200 mV/m will produced 200 μV of signal in an antenna 2 m long
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

13.
The useful magnetic flux obtainable from any closed surface is
unity
constant
both (a) and (b)
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

14.
The voltage and current distributions on a grounded λ/4 dipole (Marconi antenna) are similar to those of a half wave dipole in space.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

15.
The equation ∇ . J = 0 is called
Poisson's equation
Kirchoff's node equation
Continuity equation for static currents
Continuity equation for sampling currents
Answer: Option
Explanation:
No answer description is available. Let's discuss.