問題詳情
3.如右圖所示，電路中有一個規格標示為12 V、8.0 W的燈泡L，圖中電阻器R的電阻為6 Ω，單刀開關K按下接通時，燈泡恰好依原來的規格標示正常發光，若該燈泡符合歐姆定律，請回答下列問題：
49燈泡L的電阻為多少Ω？
(A) 1.
(B)
(C)
(D) 18
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
內容推薦
- I had a fight with my best friend. Now he doesn’t talk to me.(A) even (B) soon (C) instead (D)
- Let me _____ Mary ______ this place.(A) told; leave (B) told; to leave (C) tell; leave (D) tell
- 【題組】(A) to bake(B) baked(C) baking(D) bake
- She cheated people out of their money time after time and can be called a ________ through andthro
- The businessman is too busy. He needs a ＿＿＿ to help him with his work.(A) model (B) tower (C) se
- 【題組】48該電池理論上最大可提供的電能為多少焦耳？ (A) (B) 7(C) 8000 (D) 28800
- A: How do we get to the library?B:__________ It’s next to the bookstore.(A) Let’s play here. (B)
- 【題組】Which is true about the writer and her daughter?(A) Steak is the writer’s specialty.(B) It’s
- When visiting any website, you had better not give away your _________ information easily.(A) conf
- Maria is making cookies for her friends because there ____ a party at her home tonight.(A) will h
內容推薦
- Patty: _____ you have a great time in LA?Chris: You bet. I’m happy I went, and I_____there again
- Because they’re going to be late for the ball game, they decide to go there ____________.(A) on
- Making people believe that they are buying a product, then accepting payment but not providing ap
- 第二部分、題組(第28~40題, 共13題) 26% 克漏字選擇 (28~30) Dear Uncle Ben, I’m so happy you__(28)__ in a week. It w
- 【題組】(A) I cut my finger in the kitchen.(B) You have to plant some fruit first.(C) Just buy a hen
- I want to be an English teacher in the ＿＿＿.(A) future (B) square (C) subway (D) motorcycle
- The restaurant is ＿＿＿ Cherry Street and Maple Road.(A) along (B) on the left (C) on the corner o
- 11-15 題 段落填空The police engage in too many high-speed chases, many of which are unnecessary. A(n) ___
- Many people in Taiwan believe that capital punishment can _______ crime.(A) deter (B) perpetrate (
- 【題組】(A) visit(B) wave (C) share (D) fry
- To protect the ocean, we should ___ fishing and fishermencan only catch a ___ number of fish. (A
- 【題組】(A) reasoning (B) reckless (C) likely (D) appropriate
- Illicit or contraband materials such as weapons or drugs found in a public place may be seized by
- ◆ 六、閱讀測驗。10分（每題2分） 【A】 Fred: How was the movie? Was it good? Elle: I don’t know. I was late, so I di
- 【題組】(A) assume (B) assess (C) arrest (D) appear
- Tony threatens Peter by saying, “Give me $5,000, or I will cut off your fingers next week.” Whatcr
- 【題組】(A) Non-violent (B) Excessive (C) Violent (D) Discontinued
- 【題組】(A) safety (B) risk (C) nature (D) warrant
- The police caught the tourists who had a suitcase full of ______ objects.(A) prohibited (B) banne
- 16-20 閱讀測驗: 請根據題意，選擇一個最適當的答案。It is not always understood that the term physical evidence embraces an
- He was arrested for using ________ ID.(A) forged (B) fake(C) treasured (D) counterfeit(E) sculptu
- The narcotic detective ______ the man for weapons.(A) frisked (B) disturbed(C) patted down (D) se
- 【題組】According to the above passage, the rechecking of the scene of a crime(A) is useless when per
- 有人的祖先開始和漢人接觸，並且世代接受朝廷委派擔任地方長官；但從他父親開始，朝廷已經改派漢人官員來治理此地。這個人最可能是何時何地之人？ (A)明末時的遼東 (B)清前期的貴州 (C)乾嘉時的
- When police officers arrived at the scene of the deadly crash, they learned there had been one___