In a frequency modulated wave, the instantaneous frequency varies between 100.01 MHz and 99.99 MHz. If the audio signal frequency is 1 kHz, what is the frequency deviation?

The losses in transmission lines are

A TV tower has a height 150 m. What is the total population covered by the TV tower, if the population density around the TV tower is ${10^3}{\rm{\;k}}{{\rm{m}}^{ - 2}}?$ Radius of the earth is $6.4 imes {10^6}\;{\rm{m}}.$

Height $h$ of transmitter antenna when $R$ is radius of earth to have range $d$ is

Electromagnetic waves with frequencies greater than the critical frequency of ionosphere cannot be used for communication using sky wave propagation, because

What should be minimum length of antenna for efficient transmission of signals of wavelength λ?

Primary constant of a transmission line are

A satellite communication link operates at a frequency of 6 GHz. The transmitting and receiving antennas have gains of 40 dB and 30 dB, respectively. The distance between the satellite and the receiver is 40,000 km. If the transmitter power is 1 kW, calculate the received power, assuming free space propagation. (Take the speed of light as $3 imes 10^8$ m/s)

A telephone link operating at a central frequency of $10GHz$ is established. If 1% of this available then how many telephone channels can be simultaneously given when each telephone covering a band width of $5\,KHz$

The characteristic impedance of a coaxial cable is of the order of

The distance of coverage of a transmitting antenna is 12.8 km. Then, the height of the antenna is (Given that radius of earth = 6400 km)