An amplitude-modulated signal is given by e = 10(1 + 0.8 cos 2000πt) cos 3 × 10⁶πt volt. What is the peak voltage of the carrier wave?

5 V
8 V
10 V
100 V

Correct answer: 10 V

Solution

The peak voltage of the carrier wave is determined by the coefficient in front of the cosine function representing the carrier frequency. In this case, the carrier wave is given by the term '10 cos 3 × 10⁶πt', indicating that the peak voltage is 10 V.

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