Angle Modulation – 1 – 1

1. In FM the carrier deviation is determined by –

(a) Modulating
(b) Frequency
(c) Either of the above
(d) None of the above

ANSWER

EXPLANATION

2. Pre- emphasis is used to amplify –

(a) Low frequency
(b) High frequency
(c) Both a and b above
(d) None of the above

ANSWER

EXPLANATION

3. In FM –

(a) Noise decreases by increasing deviation
(b) Noise decreases by decreases deviation
(c) Noise decreases by maintaining deviation constant
(d) None of the above

ANSWER

EXPLANATION

4. Which of the following oscillator is not in FM –

(a) Crystal oscillator
(b) Hartley oscillator
(c) Colpitts oscillator
(d) All of the above

ANSWER

EXPLANATION

5. The frequency of the stereo sub carrier signal in FM broadcasting is –

(a) 19 kHz
(b) 38 kHz
(c) 50 kHz
(d) 76 kHz

ANSWER

EXPLANATION

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