A modulating signal is amplified by a 80% efficiency amplifier before – McqOptions

MCQOPTIONS

1.	A modulating signal is amplified by a 80% efficiency amplifier before being combined with a 20 kW carrier to generate an AM signal. The required DC input power to the amplifier, for the system to operate at 100% modulation, would be
A.	5 kW
B.	8.46 kW
C.	12.5 kW
D.	6.25 kW
Answer» B. 8.46 kW

Discussion

No Comment Found

Related MCQs

A product detector in AM systems is also called ___________
AM demodulation technique can be divided into _____ and _____ demodulation.
FFSR in AM systems stands for ________
The RF bandwidth of AM is ____________ the maximum frequency contained in the modulating message signal.
A percentage of modulation greater than ___________ will distort the message signal.
Modulation index of an AM signal is ratio of __________ to the _______
A 10 kW carrier is sinusoidally modulated by two carriers corresponding to a modulation index of 30% and 40% respectively. The total radiated power is
In a DSB-SC system with 100% modulation, the power saving is
A carrier is simultaneously modulated by two sine waves with modulation indices of 0.4 and 0.3. The resultant modulation index will be
A 2 MHz carrier is amplitude modulated by a 500 Hz modulating signal to a depth of 70%. If the unmodulated carrier power is 2 kW, the power of the modulated signal is