1. (TCO 1) A signal that is a function of time has the following properties (or
ID: 1845650 • Letter: 1
Question
1. (TCO 1) A signal that is a function of time has the following properties (or the following applies to it). (Points : 4) It is impossible to convert an analog signal into a discrete signal.An analog signal can be converted into a discrete time signal by sampling.
All analog signals are periodic in nature.
All discrete time signals are periodic in nature.
2. (TCO 1) A sinusoidal signal, 3 sin(2?t), passing through a LTI system, undergoes a gain of 4 and a time delay of 0.25 seconds. The resulting output signal will be mathematically described as (Points : 4) 7 sin(2?t - ?/4).
12 sin(2?t).
12 sin(2?t + ?/4).
12 sin(2?t 1. (TCO 1) A signal that is a function of time has the following properties (or the following applies to it). (Points : 4) A signal that is a function of time has the following properties (or the following applies to it). It is impossible to convert an analog signal into a discrete signal. An analog signal can be converted into a discrete time signal by sampling. All analog signals are periodic in nature. All discrete time signals are periodic in nature. A sinusoidal signal, 3 sin(2?t), passing through a LTI system, undergoes a gain of 4 and a time delay of 0.25 seconds. The resulting output signal will be mathematically described as 7 sin(2?t - ?/4). 12 sin(2?t). 12 sin(2?t + ?/4). 12 sin(2?t - ?/2). Determine which of the following is a linear system by applying the principle of superposition. (Points : 4) y = (2x+2) y = 2 tan(x) y= 2 log(x) y = 0.1 x A continuous time system has an output, y, which is given by It is sampled at a frequency of Hz. Determine the expression that correctly represents the discrete signal obtained after sampling and its value for n = 2. (Points : 4) y(n) = , value at n = 2 is -1 y(n) = , value at n = 2 is -0.7568 y(n) = , value at n = 2 is 0 y(n) = , value at n = 2 is -1 A signal given by 5 Cos (2*pi*36*t) + 20 Sin (2*pi*48*t) is sampled at a rate of 50 Hz. Is the Nyquist theorem violated? No, it is not violated. Yes, it is violated. Insufficient data to answer the question Cannot be determined from data given A continuous signal is described by 5 sin( 10t + 10). Its phase at t = 0 is given by 10 degrees. 5 degrees. 10 radians. 5 radians.
Explanation / Answer
An analog signal can be converted into a discrete time signal by sampling.
7 sin(2?t - ?/4)
y = 0.1 x
Question 4 not clear
Yes, it is violated.(Since it should be 2 times the max frequency in the signal)
10 degrees.
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