loraross77
10.06.2021 •
Physics
The total output power of an AM transmitter that is being operated at 50% modulation is measured to be 1800 watts. What is the carrier power?
a. 1440 watts
b. 1600 watts
c. 900 watts
d. 2025 watts
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Ответ:
b. 1600 watts
Explanation:
Modulation is the process of impressing a low frequency signal unto a high frequency signal so a to transmit over long distance.
If the modulation index (m) for an AM wave is less than 1, modulation would occur with no distortion, if m = 1, modulation occurs but if m > 1, it leads to over modulation and loss in AM envelope.
The total output power of an AM is the sum of the carrier power, upper side band power and lower side band power.
Total output power of an AM
Pc is the carrier power. Given that modulation (m) = 50% = 0.5:
Ответ:
Passengers instinctively use the car as a frame of reference, while a physicist uses Earth. ... In such a frame of reference, Newton's laws of motion take the form given in Dynamics: Newton's Laws of Motion The car is a non-inertial frame of reference because it is accelerated to the side.
Explanation: Example of inertial and Noninertial Frame of Reference