11. What is the period of a signal x(t)?
A. T
B. 2T
C. T/2
D. None of the mentioned
12. Which of the given signals are periodic?
A. x(t) = 4 cos(5πt)
B. x(t) = u(t) – 1/2
C. x(t) = 4u(t) + 2sin(3t)
D. x[n] = 2sin(3n)
13. Check whether the signal is periodic or not?
x(t) = cos(4t) + 2sin(8t)
A. Periodic with period π/2
B. Periodic with period 2
C. Periodic with period 2/π
D. Not periodic
14. Find the periodicity of the following signal. x(t)=cos((2π/7)t)sin((3π/5)t)
A. 30
B. 7
C. 35
D. 5/3
15. Find the fundamental period of 1+sin^2 (3π/5)n.
A. 10/3
B. 5
C. 3π/5
D. None of the mentioned
16. Which signal is called an energy signal?
A. Finite energy and zero power
B. Finite energy and non-zero power
C. Infinite energy and zero power
D. Infinite energy and non-zero power
17. Which signal is said to be a power signal?
A. Infinite power and zero energy
B. Infinite power and non-zero energy
C. Finite power and infinite energy
D. Finite power and zero energy
18. Determine the periodicity and also find whether it is a power or energy signal?
e(-at)u(t)
A. Periodic and energy signal
B. Non-periodic and energy signal
C. Periodic and power signal
D. Periodic and energy signal
19. Continuous Impulse signal is a power or energy signal?
A. Power signal
B. Energy signal
C. Both power and energy
D. Neither power nor energy signal
20. Discrete impulse signal is a power or energy signal?
A. Power signal
B. Energy signal
C. Both power and energy signal
D. Neither power nor energy signal