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Signals and Systems - Engineering

Q1:

The signal define by the equationsu(t -a) = 0 for t < a and u(t - a) = 1 fort ≥ a is

A a unit step function

B a shifted unit step function orginating at t = a

C a pulse function

D none of the above

ANS:B - a shifted unit step function orginating at t = a

u(t) is a unit step function u(t - a) is a unit step function shifted in time by a.