In amplitude modulation, the total modulation index should not exceed one because

The signal will be distorted

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The amplifier will be damaged

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The signal will die out quickly

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The system will fail

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Solution

The correct option is A The signal will be distorted
If the total modulation index in amplitude modulation exceeds unity, the signal will be distorted.

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When a sinusodial carrier signal is amplitude modulated by a siusodial message signal m_{1} (t), the modulation index of the resultant AM signal is 0.80. When this AM signal is simultaneously modulated by one more sinusoidal message signal m_{2} (t) the total power of the Am signal become double. The modulation index of the Am signal obtained due to m_{2} (t) alone will be_______

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When both the amplitude and the frequency of a sinusoidal message signal are doubled, the modulation index will be doubled in 1. Amplitude modulation 2. Frequency modulation 3. Phase Modulation Select the correct answer using the codes given below:

C (t) = 25 sin (2.512 \times 10^{10} t)

m (t) = 5 sin (1.57 \times 10^{8} t)

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