FREE Bachelor of Electrical Engineering Signals & Systems Questions and Answers
When the ratio of the time periods of two periodic signals is ____________, the sum of the signals is a periodic signal.
Only when the ratio of the time periods of two periodic signals is a rational number or when it is the ratio of two integers is the sum of the signals considered to be periodic. As an illustration, T1/T2 = 5/7 Periodic and T1/T2 = 5 Aperiodic.
Which system from the list below is described by partial differential functions?
Signals are spatial and temporal functions in distributed parameter systems. Since the output of dynamic systems depends on the input's past, present, and future values, differential functions can be used to characterize both of these systems.
Is the integral of the function from -infinity to +infinity for a bounded function defined and finite?
The integral loses its validity if the bounded function is, let's say, y = 2. Similar to how it is finite if it is only the block square function. Therefore, it depends on how much the signal is disseminated on either side. The integral will be finite if the spread is.
Systems of this type can accept any value from a specific set of values in their input and output, and thus are known as
Although the input and output of continuous systems are restricted by the upper bound and lower bound, they can take on any value within this range. As a result, in this system, unlimited values are possible.
Among the following signals, which one is monotonous in nature?
All of the other functions contain a periodic component, which indicates that the function eventually reaches the same value, which is contrary to what should be the case for a monotonic function.
The majority of the signals in nature are .
Signals are always continuous-time signals by nature. These also go by the name of analog signals. For all values of time t, continuous-time or analog signals are defined.
Which system from the list below is causal?
A causal system is one in which the outcome is determined by the input's past or present values rather than its future state. It is not causal if it depends on future values. In the cases where y(t)=x(t)+x(t-3)+x(t2), y(n)=x(n+2), and y(n)=x(2n2), respectively, the output is dependent on future values of x(t2), x(n + 2), and x(2n2). The output of y(t) in y(t)=x(t-1)+x(t-2) depends entirely on the prior values of x(t-1) and x(t-2) (t – 2).
Which of the following traits does not apply to deterministic signals?
Any signal that exhibits no uncertainty and whose immediate value can be precisely anticipated from its mathematical equation is said to be deterministic. A deterministic signal does not, therefore, display uncertainty. A random, though, is never guaranteed.
An illustration of a discrete collection of data or system is
The remaining parameters are all continuous. On CDs, data is kept in the form of discretized bits.
Find the range between 1.25 and 1.75 where the signal x(t) = 1/(t2 - 3t + 2) reaches its highest value:
When we differentiate the function for an optima and set it to zero, we get the desired instant of t = 1.5.
When a system follows the laws of linear dynamics, it is referred to
To be labeled as a linear system, a system must be scalable and additive.
A signal is a physical quantity that does not change with ________.
Physical quantities that change with time, space, or any other independent variables are called signals. It does not change as a result of dependent variables.
Systems of this type, which have input and output quantized at specific levels, are referred to as
Input and output values for discrete systems are constrained to certain quantized or discretized levels.
What are the signals 1-exp(-t) and 1-k*exp(-k*tsteady )'s state values?
Consider the limit at t going to infinity; in both cases, we get 1.
A system that produces results that are time invariant
The output of a time invariant system should be synchronous with its time. Scaling should not occur; therefore, y(t) = f(x(t)).
What kind of system is exemplified by amplifiers, motors, filters, etc.?
Examples of continuous time systems include amplifiers, motors, filters, and other devices that operate on a continuous time input signal and generate a continuous time output signal. Distributed parameter systems have signals that are functions of space and time in contrast to discrete time systems, which operate on discrete time signals, and unstable systems generate unbounded output from finite or unbounded input.