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Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Contributors

Feedback

Periodic Signals

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Intermediate

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For a square wave with amplitude 1 and period 2π, what is the first non-zero Fourier coefficient?

\frac{4}{\pi}

Explanation

\frac{2}{\pi}

Explanation

\frac{1}{\pi}

Explanation

2

Explanation

How many terms in a Fourier series are needed for perfect reconstruction of a signal?

a: 20 terms are sufficient Explanation

Explanation

b: 50 terms give perfect reconstruction Explanation

Explanation

c: Infinite terms theoretically Explanation

Explanation

d: Depends on the signal frequency Explanation

Explanation

Which statement about ECG signals is correct?

a: They are perfectly periodic Explanation

Explanation

b: They are quasi-periodic Explanation

Explanation

c: They are aperiodic Explanation

Explanation

d: They have constant frequency Explanation

Explanation

What happens when you increase the number of terms in the square wave series reconstruction?

a: Signal becomes smoother Explanation

Explanation

b: Gibbs phenomenon becomes more pronounced Explanation

Explanation

c: Approximation becomes worse Explanation

Explanation

d: Signal frequency changes Explanation

Explanation

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