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Amplitude Modulation – 1 – 1

1. Vestigial side band is most commonly used in –

(a) Radio transmission
(b) Television transmission
(c) Telephony
(d) All of the above

ANSWER

EXPLANATION

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%

ANSWER

EXPLANATION

3. The percentage of modulation for 45 kHz deviation the FM broadcast band will be –

(a) 30%
(b) 40%
(c) 60%
(d) 90%

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

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

ANSWER

EXPLANATION

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