Amplitude Modulation » Exercise – 1
1. Vestigial side band is most commonly used in –
(a) Radio transmission
(b) Television transmission
(c) Telephony
(d) All of the above
2. Maximum undistorted power output of a transmitter can be expected when its modulation is –
(a) 50%
(b) Between 50% and 90%
(c) 100%
(d) More than 100%
3. The percentage of modulation for 45 kHz deviation the FM broadcast band will be –
(a) 30%
(b) 40%
(c) 60%
(d) 90%
4. Which of the following statement is incorrect ?
Modulation is used to –
(a) Allow the use of practical antennas
(b) Separate differing transmission
(c) Reduce the bandwidth
(d) Ensure intelligence to be transmitted over long distances
5. The output stage of television transmittes is most likely to be a :
(a) Grid-modulated class C-amplifier
(b) Plate- modulated class C-amplifier
(c) Screen modulated class C- amplifier
(d) Grid-modulated class A-amplifier
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- Amplitude Modulation » Exercise - 16. When signal amplitude is equal to the amplitude of the carrier, the percentage modulation factor will be : (a) 25 (b) 50 (c) 100 (d) 200
- Amplitude Modulation » Exercise - 12. Maximum undistorted power output of a transmitter can be expected when its modulation is - (a) 50% (b) Between 50% and 90% (c) 100% (d) More than 100%
- Amplitude Modulation » Exercise - 15. The output stage of television transmites is most likely to be a : (a) Grid-modulated class C-amplifier (b) Plate- modulated class C-amplifier (c) Screen modulated class C- amplifier (d) Grid-modulated class A-amplifier