Electronics and Communication Engineering - Electromagnetic Field Theory

16.
Due to which of the following reasons a lightning conductor on top of a building is made into a pointed spike?
Dust particles may not accumulate
Charge per unit area becomes very high for lightening to discharge
Rain drops may not collect
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

17.
The virtual height of an ionospheric layer is __________ true height
equal to
less than
higher than
no relation
Answer: Option
Explanation:
No answer description is available. Let's discuss.

18.
The divergence of a vector is a scalar, while the curl of a vector is another
scalar
vector
unit vector
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

19.
An open wire transmission line having a characteristic impedance of 600 ohms is terminated by a resistive load of 900 Ω. The standing wave ratio will be
1.5
2.5
3.5
4.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.

20.
The skip distance is the maximum distance upto which ionospheric reflection is possible.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.