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What is the duty cycle of a square wave with equal duration positive and negative alterations?

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What is the duty cycle of a square wave with equal duration positive and negative alterations?

(a) 100%

(b) 50%

(c) 200%

(d) 25%

I have been asked this question in a national level competition.

I'd like to ask this question from Fourier Theory topic in portion Fundamentals of Electronics of Avionics

1 Answer

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Right option is (b) 50%

Easy explanation: Duty cycle is the ratio of the duration of the positive alteration t1 to the period T expressed as percentage. D= ^t1⁄T*100 = ^t1⁄2t1 * 100 = 50%.

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