Modulation and Demodulation

A. IF
B. RF amplifier
C. Audio amplifier
D. Detector

A. Sensitivity
B. Selectivity
C. Distortion
D. Fidelity

A. Audio voltage control
B. Abrupt voltage control
C. Automatic volume control
D. Automatic voltage control

A. IF and RF
B. RF and AF
C. IF and AF
D. RF and local oscillator signal

A. Phase modulation
B. Amplitude modulation
C. Frequency modulation
D. May be any one of the above

A. 455 kHz
B. 1310 kHz
C. 1500 kHz
D. 1520 kHz

A. Reduce stray capacitance
B. Stabilise d.c. bias
C. Increase the Q of tuned circuit
D. Reduce noise

A. 3
B. 6
C. 5
D. None of the above

A. 20 %
B. 40 %
C. 50 %
D. 10 %

A. Crystal
B. Wien-bridge
C. Phase-shift
D. Hartley