If I (s) , initial value of i(t) is 5A 12.5 A 0.05 A 1250 A .

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5A

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If I (s) , initial value of i(t) is 5A 12.5 A 0.05 A 1250 A .

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Signals and Systems problems

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4. For the discrete time system of the given figure
Options
A. y_k - 0.5 y_k_{- 1} - 0.25 y_k_{- 2} = u_k
B. y_k + 0.5 y_k_{- 1} - 0.25 y_k_{- 2} = u_k
C. y_k - 0.5 y_k_{- 1} + 0.25 y_k_{- 2} = u_k
D. y_k + 0.5 y_k_{- 1} + 0.25 y_k_{- 2} = u_k

6. The analog signal given below is sampled by 600 samples per second for m(t) = 3 sin 500 pt + 2 sin 700 pt then folding frequency is
Options
A. 500 Hz
B. 700 Hz
C. 300 Hz
D. 1400 Hz

9. A voltage V(t) is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt². If it is measured by a dc meter. The reading will be
Options
A. 0
B. 4
C. 2
D. 2

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