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# EC6303 Signals and Systems Important questions

EC6303 Signals and Systems Important questions Regulation 2013 Anna University free download. Signals and Systems EC6303 Important questions pdf free download.

## Sample EC6303 Signals and Systems Important questions:

1 Define Signal

Signal is a physical quantity that varies with respect to time , space or any other independent variable.
Or It is a mathematical representation of the system Eg y(t) = t. and x(t)= sin t.

2 Define system .

A set of components that are connected together to perform the particular task. (ec6303 signals and systems important questions)

3 What are the major classifications of the signal?

(i) Discrete time signal
(ii) Continuous time signal

4 Define discrete time signals and classify them.

Discrete time signals are defined only at discrete times, and for these signals, the independent variable
takes on only a discrete set of values. (ec6303 signals and systems important questions)

Classification of discrete time signal:
i. Periodic and Aperiodic signal
ii. Even and Odd signal
iii. Causal Non Causal
iv. Energy and Power

5 Define continuous time signals and classify them.

Continuous time signals are defined for a continuous of values of the independent variable. In the case of
continuous time signals the independent variable is continuous. For example:
(i) A speech signal as a function of time
(ii) Atmospheric pressure as a function of altitude  (ec6303 signals and systems important questions)

Classification of continuous time signal:
i. Periodic and Aperiodic signal
ii. Even and Odd signal
iii. Causal Non Causal
iv. Energy and Power
v. Random and Deterministic Signals

6 Define discrete time unit step &unit impulse.

Discrete time Unit impulse is defined as
δ [n]= {0, n ≠ 0
{1, n=0 Unit impulse is also known as unit sample.
Discrete time unit step signal is defined by
U[n]={0,n=0
{1,n>= 0

7 Define continuous time unit step and unit impulse.

Continuous time unit impulse is defined as
δ (t)={1, t=0
{0, t ≠ 0

Continuous time Unit step signal is defined as
U(t)={0, t<0
{1, t ≥ 0 (ec6303 signals and systems important questions)

 Subject Name Signals and Systems Subject Code EC6303 Regulation 2013