In amplitude modulation, the message signal

V_m(t) = 10 sin (2$$\pi$$ $$\times$$ 10⁵t) volts and

Carrier signal

V_C(t) = 20 sin(2$$\pi$$ $$\times$$ 10⁷ t) volts

The modulated signal now contains the message signal with lower side band and upper side band frequency, therefore the bandwidth of modulated signal is $$\alpha$$ kHz. The value of $$\alpha$$ is :

What should be the height of transmitting antenna and the population covered if the television telecast is to cover a radius of 150 km? The average population density around the tower is 2000/km² and the value of R_e = 6.5 $$\times$$ 10⁶ m.

Match List - I with List - II.

List - I

(a) 10 km height over earth's surface

(b) 70 km height over earth's surface

(c) 180 km height over earth's surface

(d) 270 km height over earth's surface

List - II

(i) Thermosphere

(ii) Mesosphere

(iii) Stratosphere

(iv) Troposphere

A carrier signal C(t) = 25 sin(2.512 $$\times$$ 10¹⁰t) is amplitude modulated by a message signal m(t) = 5 sin(1.57 $$\times$$ 10⁸t) and transmitted through an antenna. What will be the bandwidth of the modulated signal?