A periodic rectangular pulse train shown in Figure 1 has amplitude A = 1 V, period T0 = 1 1 s, and pulse width ? = 0.15s. This signal is applied to a circuit shown in Figure 2. R = 1?, L = 0.1H. H(?) = Y(?)/F(?). ?0 = 2?/T0.
(a) Find the numerical values of cn and ?n of f(t) for n = 1.
(b) Find the numerical values of |H(jn?0)| and ?H(jn?0) for n = 1. (c) Find the numerical values of ycn and y?n of y(t) for n = 1.
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Answer the following statement(s) true (T) or false (F)
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All ladders must extend above the top of the excavation wall by at least _____ feet.
a. 2 b. 3 c. 4 d. 5
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A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Although shielding gases are not toxic, they _____
a. are highly explosive b. can decompose into toxic gases c. can displace oxygen when released in a large quantity d. cause rapid metal corrosion