The amplitude of $$15 \sin (1000 \pi \mathrm{t})$$ is modulated by $$10 \sin (4 \pi \mathrm{t})$$ signal. The amplitude modulated signal contains frequency (ies) of
A. $$500 \mathrm{~Hz}$$
B. $$2 \mathrm{~Hz}$$
C. $$250 \mathrm{~Hz}$$
D. $$498 \mathrm{~Hz}$$
E. $$502 \mathrm{~Hz}$$
Choose the correct answer from the options given below:
| List I | List II |
|---|---|
| A. Attenuation | I. Combination of a receiver and transmitter. |
| B. Transducer | II. process of retrieval of information from the carrier wave at receiver |
| C. Demodulation | III. converts one form of energy into another |
| D. quad Repeater | IV. Loss of strength of a signal while propagating through a medium. |
Choose the correct answer from the options given below:
A sinusoidal carrier voltage is amplitude modulated. The resultant amplitude modulated wave has maximum and minimum amplitude of $$120 \mathrm{~V}$$ and $$80 \mathrm{~V}$$ respectively. The amplitude of each sideband is :
The modulation index for an A.M. wave having maximum and minimum peak-to-peak voltages of 14 mV and 6 mV respectively is-
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