What are three types of antenna types?
 

A TV tower is $120 \mathrm{m}$ high, How much more height is to be added to it if its cover range is ti become double?

The sound waves after being converted into electrical waves are not transmitted as such because:

In public broadcasting system the message signal from microphone to speaker is transmitted through pair of copper cables here in this case the communication channel is:

A particular cable has a capacitance of 40 pF/ft and a characteristic impedance of $70\mathrm{ }\mathrm{\Omega }$ :

i. What is the inductance per foot of this cable?

ii. Determine the impedance of an infinitely long section of such cable.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$