Question No. 1
In a network environment, two
stations (A and B) are communicating with each other using a wired transmission
medium. The information is being carried in the form of digital signal, where
each level of the digital signal is converted to its respective binary
representation before transmitting. If the digital signal has 12 levels, find
out the number of bits that can be used to represent each level of the digital
signal.
Answer:
Number of bits per level =
log2 12 = 3.585
bits
Question No.2
An XYZ company is using a high frequency for its
transmission lines to supply electric power. If they are using a frequency of
220 Hz for the transmission of electric supply, find out the time period (in milliseconds)
of the given electrical signal.
Answer:
Time period = T
= ?
T=0.00455s
Time in milliseconds = ?
T=4.55ms
Question No.3
If a simple sine wave is offset with respect to time Zero by
1/8 cycles; you are required to find out the phase of that sine wave in
Radians.
Answer:
Sine wave offset with respect to time 0 in degrees = 1/8*360=45
Phase of sine wave
in Radians = 45*2PI/360
Phase of sine wave
in Radians = 0.785 rad.
Question No.4
An electronics company has made an oscillator that can
generate a sine wave, which changes so rapidly that it’s interval of the wave
can’t be determined. What will be the frequency of this sine wave?
Answer:
sine
wave has the infinite frequency.
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