1) Which of the following signal is not periodic?

a) sin 10t

b) sin 31t

c)sin 10t + sin 31t

d) sin(10t +31)

2) The value of the integral dt is

a) 0

b)

c)

d)

3) A system is defined by its input and output relationship y(t)=5x(t+3)+2 where y(t) and x(t) are the output and input respectively. The system is

a) Linear and Casual

b)Linear and non-casual

c) non-linear and casual

d) non-linear and non-casual

4) If the input-output relation of a system is y(t)= then the system is

a) Linear, time invariant and unstable

b) linear ,non-causal and unstable

c) linear, causal and time invariant

d) non-causal, time invariant and unstable

5) Evaluate te function dt

a)

b)

c)

d) 9