A signal wave of frequency 12 kHZ is modulated with a carrier wave of frequency 2.51 MHz. The upper and lower side band frequencies are respectively
2512 kHz and 2508 kHz
2522 kHz and 2488 kHz
2502 kHz and 2498 kHz
2522 kHz and 2498 kHz
The range of frequencies allotted for FM radio is
88 to 108 kHz
88 to 108 MHz
47 to 230 kHz
47 to 230 MHz
B.
88 to 108 MHz
There is a national frequency allocation plan for everything from man radio to radio astronomy. Radio frequencies in the 88 to 108 MHz range are set aside exclusively for FM broadcasting. No less than 34 channels can be accomodated in this range at a single location, allowing for a separation of 400 kHz between channels.
If a radio receiver amplifies all the signal frequencies equally well, it is said to have high
fidelity
distortion
sensibility
sensitivity
A TV tower has a height of 100 m. What is the maximum distance up to which the TV transmission can be received (R = 8 × 106 m) ?
34.77 km
32.70 km
40 km
40.70 km
Amplitude modulation has
one carrier with infinite frequencies
one carrier with two side band frequencies
one carrier with high frequency
one carrier
The waves used for Line-of-Sight (LOS) communication is
sound waves
ground waves
sky waves
space waves
The process of superimposing message signal on high frequency carrier wave is called
amplification
demodulation
transmission
modulation
A basic communication system consists of
ii, i, iv, v and iii
i, ii, iii, iv and v
ii, v, i, iv and iii
ii, iv, i, iii and v