Causal and non-causal systems in real world

1. What is causal and non causal system example?
2. What is non causal system with example?
3. What are some practical example of a causal system?
4. What is a causal system give an example?

What is causal and non causal system example?

A causal system is one whose output depends only on the present and the past inputs. A noncausal system's output depends on the future inputs. In a sense, a noncausal system is just the opposite of one that has memory. How can a real-world system be noncausal?

What is non causal system with example?

The non-causal systems can generate an output before the input is given, hence they are also known as anticipative systems. The non-causal systems do not exist in real time. Also, these systems are not physically realisable. The image processing systems are the examples of noncausal systems.

What are some practical example of a causal system?

a) y(t)=x(t)

Here, the signal is only dependent on the present values of x. For example if we substitute t = 3, the result will show for that instant of time only. Therefore, as it has no dependence on future value, we can call it a Causal system.

What is a causal system give an example?

A system is said to be causal if its output depends upon present and past inputs, and does not depend upon future input. For non causal system, the output depends upon future inputs also. Example : y(n) = 2 x(t) + 3 x(t-3) For present value t=1, the system output is y(1) = 2x(1) + 3x(-2).