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1
JEE Main 2023 (Online) 24th January Morning Shift
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-1
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A modulating signal is a square wave, as shown in the figure.

JEE Main 2023 (Online) 24th January Morning Shift Physics - Communication Systems Question 13 English

If the carrier wave is given as $$\mathrm{c(t) = 2\sin(8\pi t)}$$ volts, the modulation index is :

A
$$\frac{1}{3}$$
B
1
C
$$\frac{1}{4}$$
D
$$\frac{1}{2}$$
2
JEE Main 2022 (Online) 29th July Morning Shift
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Find the modulation index of an AM wave having $$8 \mathrm{~V}$$ variation where maximum amplitude of the AM wave is $$9 \mathrm{~V}$$.

A
0.8
B
0.5
C
0.2
D
0.1
3
JEE Main 2022 (Online) 28th July Evening Shift
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A FM Broadcast transmitter, using modulating signal of frequency 20 kHz has a deviation ratio of 10. The Bandwidth required for transmission is :

A
220 kHz
B
180 kHz
C
360 kHz
D
440 khz
4
JEE Main 2022 (Online) 28th July Morning Shift
MCQ (Single Correct Answer)
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In the case of amplitude modulation to avoid distortion the modulation index $$(\mu)$$ should be :

A
$$\mu \leq 1$$
B
$$\mu \geq 1$$
C
$$\mu = 2$$
D
$$\mu = 0$$
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