28.某一電阻器在 25℃時,電阻值為4Ω,在125℃時電阻值為6Ω,求此電阻器在75℃時之溫度係數為多少?
(A)0.002oC-1
(B)0.003oC-1
(C)0.004oC-1
(D)0.005oC-1
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統計: A(21), B(17), C(100), D(80), E(0) #2194517
統計: A(21), B(17), C(100), D(80), E(0) #2194517