Exercise: Communication Systems

Questions for: Communication Systems

If the plate supply voltage for a plate modulated class C amplifier is E, the maximum plate cathode voltage could be almost as high as
A:
E
B:
2 E
C:
3 E
D:
4 E
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
In a TV receiver the raster is normal but there is no sound and quality of picture is poor. The defective part is
A:
power supply
B:
loudspeaker
C:
AGC, video IF amplifier, RF amplifier
D:
horizontal oscillator
Answer: C
No answer description is available. Let's discuss.
📖
📝
💬
👁️
If F(ω) is Fourier transform of f(t), then the Fourier transform of f(t) cos ωct is
A:
F(ω + ωc) + F(ω - ωc)
B:
[F(ω + ωc) + F(ω - ωc)]
C:
F(ω + ωc) - F(ω - ωc)
D:
[F(ω + ωc) - F(ω - ωc)]
Answer: B
No answer description is available. Let's discuss.
📖
📝
💬
👁️
In a single tone AM the power of carrier is P and modulation index is m. The powers of each of the two side bands are
A:
B:
C:
D:
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
If transmission path, in PCM, is very long then
A:
repeater stations are used
B:
pulse width may be increased
C:
pulse amplitude is increased
D:
pulse spacing is reduced
Answer: A
No answer description is available. Let's discuss.
📖
📝
💬
👁️
Ad Slot (Above Pagination)
Quiz