39. Once triggering on, the SCR (with the cathode connected to common) will conduct for the remainder of a(n) a AC cycle I c. positive alternation DC cycle b. negative alternation d. 40. When testing an SCR with an ohmmeter by placing the negative lead on the cathode and the positive lead on the gate results in a low resistance reading, this would indicate that the SCR is a good c. inconclusive b. bad d. none of the above 41. For a triac to conduct for one complete cycle of a sine wave, a the gate must be pulsed once at 0 degrees b. the gate must be pulsed at 0 degrees and at 180 degrees c. the gate must be pulsed at 0 degrees and at 270 degrees none of the above d.

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1. 2) How to determene Cutoff frog . ond which Crlunt has Hhis characterestics ond why Vout Vaut

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The subject is Communication Systems ( PULSE CODE MODULATION ) Please send the answer by typing i don't want any handwritten. Q4)Explain the process of sampling and quantisation & give example?

Worksheet IV_2021 1. Identify each of the following expressions as SOP, standard SOP, POS, or standard POS: (a) AB + ABD + ĀCD (c) ABC + ABC (b) (A + B + C)(A + B + C) (d) A(A + C)(A + B) 2. Convert each SOP expression in Question 1 to standard form. 3. Convert each POS expression in Question 1 to standard form. 4 Obtain the truth table of the following functions, and express each function in sum-of-minterms and product-of-maxterms form: (a) (xy +z)(y + xz) (c) x'z + wx'y + wyz' + w'y' (b) (x + y')(y' + 2) (d) (xy + yz + x'z)(x + z) .5. Simplify the following Boolean expressions to a minimum number of literals: (а)* АВС + А'В + АВС (c)* (x + y)'(x' + y') (e)* (BC' + A'D)(AB' + CD') (b) x'yz + xz (d) xy + x(wz + wz') (f) (x + y' + z')(x'+ z') 6. Write the Boolean equations and draw the logic diagram of the circuit whose outputs are defined by the following truth table: a f2 1 1 1 1 1 1 1 1 1 1 1 Page 1 of 1