In an amplitude modulator circuit, the carrier wave is given by, C(t) = 4 sin(20000 πt) while modulating signal is given by, m(t) = 2 sin (2000 πt). The values of modulation index and lower side band frequency are :
(1) 0.3 and 9 kHz
(2) 0.5 and 10 kHz
(3) 0.4 and 10 kHz
(4) 0.5 and 9 kHz
