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48. 有一電路P = 3W,則下列敘述何者正確?(A)每秒提供(或消耗)3焦耳之能量(B)無效功率等於3VAR(C) 3秒提供(或消耗)了9焦耳能量(D)能量等於3焦耳
問題詳情
48. 有一電路P = 3W,則下列敘述何者正確?
(A)每秒提供(或消耗)3焦耳之能量
(B)無效功率等於3VAR
(C) 3秒提供(或消耗)了9焦耳能量
(D)能量等於3焦耳
參考答案
答案:A,C
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上一篇 :
47. 下列基本電學相關的敘述,何者正確?(A) 1度電相當於1仟瓦之電器使用1小時(B)導體中電子流動的方向就是傳統之電流的反方向(C)使電荷移動而做功之動力,稱為電功率(D)同性電荷相斥、異性電荷
下一篇 :
49. 改善功率因數之效益,下列敘述何者正確?(A)增加線路電流(B)增加系統供應容量(C)減少線路電力損失(D)增加線路電力損失
資訊推薦
50. 交流電路中,平均功率是指一個交流週期中瞬間功率的平均值,若將100V、60Hz之正弦交流電壓加於50Ω的純電阻兩端,則下列敘述何者正確?(A)瞬間功率之頻率為60Hz(B)瞬間功率最大值為40
作文題目:生命的轉彎處 說明:請用白話散文方式寫成作交一篇,文長不拘,必須有清楚的段落,運用新式的標點符號。請勿用新詩體裁寫作。
23. 如右圖所示電路,當開關 S 按下甚久(t>5τ)之後,電容上之電壓 VC應為 (A)20V(B)12V(C)8V(D)0V。
21. 已知有甲、乙、丙三個等差數列如下:甲:2001,2003,2005,……,2793,2795乙:2003,2005,2007,……,2793,2795丙:2004,2006,2008,……,2
2. Once the virus is introduced on a farm, ______ can occur between mink, as well asfrom mink to oth
3. If your pet tests positive for the virus, follow the ______.(A) denotations (B) donation (C) desc
4. If your pet shows any signs of illness, call your veterinarian to arrange _____.(A) treatment (B)
5. Cat owners can’t distinguish between their cat’s smell and the ____ of another cat.(A) kidney (B)
6. _____ can trigger protective immune responses.(A) Vacancy (B) Virus (C) Vacuum (D) Vaccines
7. The disease is sometimes a _____ viral disease that affects cloven-hoofed animals.(A) fatal (B) m
8. The girls _____ like statues, too scared to move or call for help.(A) froze (B) fled (C) escaped
9. If your adult dog does have _____ teeth than 42, it could be because they have lostor broken on a
10. Through daily rituals, enrichment activities, and observation, you can provideyour pets with the
11. Phone your practice if you can’t afford the ____ of a vet appointment.(A) charge (B) cost (C) sp
12. In case the patient is in _____ condition, the triage nurse will directly send thepatient to the
13. If the physical exam reveals that your dog has a heart murmur, your veterinarianwill _____ furth
14. Pets experience a range of ___ similar to those we experience: love, joy, and fear.(A) emotions
15. Some flea preventatives for cats ____ you to wear gloves to apply.(A) comment (B) acquire (C) pr
16. The heart is ______, with the left side being larger than the right side.(A) balanced (B) symmet
17. Staff must wear disposable caps and ______ when entering the surgical suite.(A) masks (B) marks
18. To _____ an abnormal situation, you must recognize what is normal for your pet.(A) refine (B) ac
19. If your pet is on any medication, please ______ with your vet whether themedication should be co
20. It’s said that the virus is infectious during its ________ period.(A) occupation (B) inclusion (
21. Through_______, you can separate your animals from other animals.(A) quarantine (B) dissection (
22. A balanced _____ is important to your dog’s growth and overall health.(A) diary (B) diet (C) dai