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Signals & SystemsSystem Properties

A system is causal if its output at any time depends only on?

  • AFuture input values
  • BPresent and past input values
  • CFuture output values only
  • DThe input at t=infinity
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Correct Answer: B. Present and past input values
Explanation: A causal system cannot depend on future input values; its output may depend on present and past inputs.
Reference: Standard signals and systems: system properties
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