# Elementary Signals – 1 MCQ’s

This set of Signals & Systems Multiple Choice Questions & Answers (MCQs) focuses on “Elementary Signals – 1″.

1. In the equation x (t) = beat if a < 0, then it is called ______
a) Growing exponential
b) Decaying exponential
c) Complex exponential
d) Both Growing and Decaying exponential

2. In the below figure if R value is increased then which of the following is true?

a) Slower the rate of decay of v (t)
b) Greater the rate of decay of v (t)
c) Decay rate is independent of R
d) Decay rate depends only on the capacitor value

3. The general form of real exponential signal is________
a) X (t) = beat
b) X (t) = (b+1)eat
c) X (t) = b (at)
d) X (t) = be (a+1)t

4. The time period of continuous-time sinusoidal signal is given by _____
a) T = 2π / w
b) T = 2π / 3w
c) T = π / w
d) T = π / 2w

5. X [n] = 2 cos (2n) is periodic or not?
a) Periodic with period 2n
b) Periodic with period 2π
c) Periodic with period 2
d) Non periodic

6. Find the smallest angular frequency for which the discrete time signal with fundamental period N=8 would be periodic?
a) π4
b) π2
c) 4
d) π16

7. The natural angular frequency of the parallel LC circuit is?

a)

b)

c)

d)

8. Check whether x [n] = 7 sin (6πn) is periodic and if it is period calculate its fundamental period?
a) Periodic with fundamental period 6π
b) Periodic with fundamental period 3
c) Periodic with fundamental period 1
d) Non periodic

9. Euler’s identity e is expanded as _____
a) cos θ + j sin θ
b) cos θ – j sin θ
c) cos θ + j sin 2θ
d) cos⁡ 2θ+j sinθ

10. Exponentially damped sinusoidal signal is ______
a) Periodic
b) Non periodic
c) Insufficient information
d) Maybe periodic 5 Star
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