WorksheetsSignals and Systems
Total questions: 22
Worksheet time: 11mins
Which of the following is not an example of signal
Blood Pressure
temperatre
aircraft
speech
The signal which is defined only at origin i.e only at t=0 is
unit step signal
impulse signal
exponential signal
ramp signal
Graphical representation of a signal in time domain is called
Frequency Spectrum
Frequency
Waveform
None of the above
An example of a discrete set of information/system is
the trajectory of the Sun
data on a CD
universe time scale
movement of water through a pipe
Under which conditions does an initially relaxed system become unstable?
only if bounded input generates unbounded output
only if bounded input generates bounded output
only if unbounded input generates unbounded output
only if unbounded input generates bounded output
Which of this is not a type of analog modulation
amplitude modulation
frequency modulation
phase modulation
frequency shift keying
Unit Step function is defined by
u(n) = 1, n ≥ 0
= 0, n < 0
u(n) = 1, n = 0
= 0, n ≠ 1
u(n) = 1, n ≤ 0
= 0, n ≠ 1
u(n) = 1, n ≤ 0
= 0, n ≥ 1
Any physical phenomenon that carries some information is
System
Processor
Signal
None
The interface between an analog signal and a digital processor is
D/A converter
A/D converter
Modulator
Demodulator
Which of the following characterizes an analog quantity?
Discrete levels represent changes in a quantity.
Its values follow a logarithmic response curve.
It can be described with a finite number of steps.
It has a continuous set of values over a given range.
Which type of signal is represented by discrete values?
Nois signal
Non linear
Analog
Digital
The process of conversion of continuous time signal into a discrete time signal is known as
Aliasing
Sampling
Convolution
None of the above
Scientific notation is a method
of expressing a very large number
of expressing a very small number
used to make calculations with large and small numbers
All of the above
Signal processing undergoes a change in
Amplitude
Phase
Freuency
All of the above
Quantized and coded version of the discrete time signals are
Analog signals
Digital signals
Both A and B
Coded signal
