A function having frequency f is to be sampled. The sampling time T should be Sa

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Question
A function having frequency f is to be sampled. The sampling time T should be
Options
A.
B.
C.
D.

Correct Answer

Explanation

Sampling frequency must be more than 2f. Therefore

A function having frequency f is to be sampled. The sampling time T should be Sampling frequency mus

.

Signals and Systems problems

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4. 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

6. 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

8. 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
Options
A. a step function
B. a pulse function
C. a shifted step function originating at t = a
D. none of the above

9. 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
Options
A.
B.
C. -X(f/2)e^j2pf
D. -X(f/2)e^{- j2pf}

10. 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
Options
A. 5%
B. more than 5%
C. less than 5%
D. equal or more than 5%

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