Question 2,3 - ,Block dig.of communication system,
Transducer, signal,Noise,Transmitter. (English)

Question 3,4 - Receiver, Attenuation, Amplification,
Demodulation, Repeater.Range T.V tower. (English)

Question 5,6,7 - Band width,Need for modulation,
Propagation of em waves. (English)

Question 8 - Amplitude modulation,Modulation index (English)

Question 9,10 - Production & Detection of AM (English)