Q. One of the advantages of base modulation over collector modulation of a transistor class C amplifier is
✅ Correct Answer: (D)
the lower modulating power requirement
Communication Skill MCQs and Notes
Q. The direction of rotation of a CD is
✅ Correct Answer: (B)
anticlockwise
Q. Leak type bias is used in plate modulated class C amplifier to
✅ Correct Answer: (C)
prevent excessive grid current
Q. A buffer amplifier is
✅ Correct Answer: (B)
a high gain d.c. amplifier
Q. In a FM receiver, amplitude limiter
✅ Correct Answer: (C)
eliminates any change in amplitude of received fm signals
Q. The characteristic impedance of a twin wire feeder used for TV signals is about
✅ Correct Answer: (C)
300 ohm
Q. The maximum power output of a standard A earth station over the total band allocated to satellite communication is about
✅ Correct Answer: (A)
0.5 kw
Q. In EM waves, polarization
✅ Correct Answer: (C)
is due to transverse nature of waves
Q. In practical commercial FM system, channel bandwidth is
✅ Correct Answer: (A)
150 khz