In the TV receivers, the device used for tuning the receiver to the incoming signal is
A. Varactor diode
B. High pass Filter
C. Zener diode
D. Low pass filter
A. Change in amplitude of the carrier according to modulating signal
B. Change in frequency of the carrier according to modulating signal
C. Change in amplitude of the modulating signal according to carrier signal
D. Change in amplitude of the carrier according to modulating signal frequency
A. Sensitivity
B. Selectivity
C. Stability
D. None of the above
Emitter modulator amplifier for Amplitude Modulation
A. Operates in class A mode
B. Has a low efficiency
C. Output power is small
D. All of the above
A. Have better sensitivity
B. Have high selectivity
C. Need extra circuitry for frequency conversion
D. All of the above
A. Carrier frequency
B. Upper side band frequency
C. Lower side band frequency
D. All of the above