Two function g1(t) and g2(t) with correlation of 6 has average power of 4 and 5

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Question
Two function g₁(t) and g₂(t) with correlation of 6 has average power of 4 and 5 respectively. The power of g₁(t) + g₂(t) is
Options
A. 9
B. 21
C. 3
D. 15

Correct Answer

21

Explanation

Power of two correlated signal is P = P₁ + P₂ +2R₁, ₂(t).

Signals and Systems problems

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C.
D.

5. A geostationary satellite is one which
Options
A. hangs motionless in space about 36000 km about Earth
B. travels around the Earth in 24 hours
C. remains stationary above the Earth
D. appears stationary to everybody on Earth

7. The signal defined by the equations f(t) = 0 for t < 0, f(t) = E for 0 ? t ? a and f(t) = 0 for t > a is
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A. a step function
B. a pulse function
C. a shifted step function originating at t = a
D. none of the above

8. Let x(t) and y(t) with F.T. x(f) and y(f) respectively be related as shown in figure

Then y(f) is
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A.
B.
C. -X(f/2)e^j2pf
D. -X(f/2)e^{- j2pf}

9. A voltage wave having 5% fifth harmonic content is applied to a series RC circuit. The percentage fifth harmonic content in the current wave will be
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A. 5%
B. more than 5%
C. less than 5%
D. equal or more than 5%

10. The system with given pole-zero diagram is
Options
A. casual
B. non-casual
C. both sided
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