27.某交流電源電路,若跨於某元件上之瞬時電壓為v (t)= 500sin(ωt+ 60° )V,而流過此元件之瞬時電流為i (t)= 20sin (ωt+ 60° )A,則此元件性質必為下列何者?
(A)電容性
(B)電感性
(C)電阻性
(D)無法判斷
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統計: A(16), B(25), C(346), D(11), E(0) #2821270
統計: A(16), B(25), C(346), D(11), E(0) #2821270