Reference no: EM13961523
1. Pick the best test signal for any system
(a) Impulse (b) unit step (c)ramp (d) all of these.
2. Find the even component of the signal x(t)=cost+sint+costsint+sin2t+cos3t
Cost+cos3t+costsint (b)sint+sin2t (c) cost+sin2t (d)cost+sin2t+cos3t
3. Trace the odd component of unit step signal
4. Find the period of the signal x(t)=cos4t+sin6t
(a) ∏ (b) ∏/2 (c)2∏ (d) none of these
5. A system with response y(n)=nx2(n) is
(a) non linear (b) time invariant (c) causal (d) all of these
6. Discrete impulse function can also be represented as
(a) u(n)+u(n-1) (b) u(n)-u(n-1) (c) u(n)-u(n+1) (d) u(n)+u(n-1)
7. A signal x(t)=sint is given to a invertible system then the response is
(a)1/sint (b)cost (c)sint (d)-sint
8. A system y(t)= 6x(t)+8x(t-7) is
(a) dynamic (b)static (c)causal (d)both a&c
9. The value equal to δ(-12t)=
(a)1/12δ(t ) (b)-1/12δ(t) (c)δ(t) (d)12δ(t)
10. Find the power of a signal x(t)=cos2t
(a) 1 (b)0 (c)1/2 (d)2
11. x(n)=u(n) is
(a)1 (b) infinite (c) not periodic (d) o
12. Energy of the signal Aδ(n) is
(a)A2/2 (b) 0 (c)A2 (d) NONE
13. The signal u(t) is
(a) strictly energy (b)power signal (c) neither energy nor power signal (d)none
14. The period of a signal x(t)=2sin2t-2cos√2t is
(a) 2 (b) ½ (c) not periodic (d)1/√2
15. The period of the signal cos πn/3+sin πn/2
(a) 4 (b)3 (c)12 (d)24
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