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In an amplitude modulator circuit, the carrier wave is given by, C(t) = 4 sin(20000 π t) while modulating signal is given by, m(t) = 2 sin (2000 π t). 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

Correct answer: 0.5 and 9 kHz

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