
Signal Representations and Mathematica Operationsl
Authored by MIMI FAISYALINI BINTI RAMLI MIMI FAISYALINI BINTI RAMLI
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The unit step function u(t) has a value of 1 when:
t<0
t=0
t>0
All of the above
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The mathematical expression for a shifted unit step function that turns on at t=a is:
u(t+a)
u(t−a)
u(a−t)
u(t)×a
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a rectangular pulse that starts at t=a and ends at t=b, the correct expression is:
u(t−a)+u(t−b)
u(t+a)−u(t+b)
u(t−a)−u(t−b)
u(t)−u(t−a)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The general form of a sinusoidal signal is:
A cos (ωt+ϕ)
At sin (ω+ϕ)
Aejt
A/(ωt)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In engineering, the step function is used to represent:
A continuous process
Voltage or current switched on at a specific time
A random signal
A sinusoidal wave
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A ramp signal represents:
A signal increasing linearly with time
A signal decreasing exponentially
A constant pulse
A periodic signal
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The exponential function eat represents:
A sinusoidal wave
Exponential growth or decay
A step signal
An impulse
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