The NAND logic function of a relay ladder circuit is performed by __________.
A. two or more N.O. push buttons connected in series
B. two or more N.O. push buttons connected in parallel
C. two or more N.C. push buttons connected in series
D. two or more N.C. push buttons connected in parallel
Answer: D
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Fill in the blank(s) with the appropriate word(s).
a. Find the equivalent impedance Zo seen by the source in Figure P4.66(a). Assume the frequency is 377 rad/s.
b. What capacitance should be placed between terminals a and b, as shown in Figure P4.66(b), to make the equivalent impedance Zo purely resistive? [Hint: Find C so that the phase angle of Zo is zero.]
c. What is the amplitude of Zo when the capacitor is included?