Consumer Electronics

Multiple Choice Questions

1. In AM
   1. the phase remains constant
   2. the amplitude remains constant
   3. the frequency remains constant
   4. none of the above
2. In FM
   1. the amplitude remains constant
   2. the phase remains constant
   3. the frequency remains constant
   4. none of the above
3. The intelligence to be transmitted usually consists of an audio modulating signal with frequencies in the range
   1. dc to several MHz
   2. 20 Hz to 20 kHz
   3. 20 kHz to 20 MHz
   4. dc to 20 Hz
4. The modulating signal is superimposed upon the radio frequency carrier by applying both to a
   1. linear impedance
   2. complex impedance
   3. non-linear impedance
   4. none of the above
5. The resulting modulated wave consists of
   1. the original carrier frequency
   2. sum of frequencies
   3. difference of frequencies
   4. only (b)and (c)
6. The width ...