1561.
Radiation pattern is .............. dimensional quantity
A
Two
B
three
C
Single
D
none
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Radiation pattern is .............. dimensional quantity
Two
three
Single
none
Which of the following is true
Time changing current radiates
accelerated charges radiates
Both a and b
none
Antennas are of .............. types
Two
four
Infinite
none
Antennas convert
Photons to electrons
electrons to photons
Both a and b
none
------------------------ is used for frequency domain representation of continuous periodic signal
Fas fourier transform
Discrete time fast fourier transform technique
Fourier series
Fourier transform
which of the following is the correct application of Fourier analysis
Acoustics and Oceanography
All of the above
Image processing
X-ray crystallography
Any non-sinusoidal waveform can be expressed as the sum of various sinusoidal components
cant say
none of these
true
false
When a sinusoidal signal is viewed along the frequency axes, t appears like
sinusoidal wave
sinusoidal wave with 90 degree phase shift
A straight line equal to the height of sinusoid
cosine wave
Frequency domain analysis explains a signal in
Frequency - Phase Axes
Frequency - Time Axes
Frequency - Amplitude Axes
Time - Amplitude Axes
Time domain analysis explains a signal in
Time - Frequency Axes
Frequency - Amplitude Axes
Frequency - Phase Axes
Time - Amplitude Axes
The three standard colors used for video transmission are
red, blue, yellow
red, blue, green
red, yellow, green
blue, yellow, white
A power signal has power and energy specification as
Power = finite and Energy = finite
Power = finite and Energy = infinite
Power = 0 and Energy = infinite
Power = infinite and Energy = 0
An Energy signal has Energy and Power Specification as
P =infinite and E = finite
P =finite and E = 0
P =unity and E = finite
P =0 and E = finite
Spot the incorrect periodic signal among the following
Square wave function
Cosine Function
Exponential Function
Sine Function
Which is incorrectly matching statement
Deterministic and Random
Digital and Continuous
Periodic and Aperiodic
Causal and Non Causal
Sophisticated technological advancement has now introduced new modes of communication in
Mobile Communication
Satellite Communication
Optical Fiber Communication
All of the above
Distortion less communication system has a impulse response of
infinity
zero
greater than 1
unity
Broadcasting is the dissemination of the information to
2 users
multi users
4 users
1 user
Sound communication started for the first time by starting
Satellite
Telephony
Television
Microwaves
Normally when the signal is represented, the independent axis is of
Phase
Time
Frequency
Amplitude