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w qv w 1/2qv 在 [考題] 基本電學- 看板Examination - 批踢踢實業坊 的推薦與評價


作者sohuge (托下巴)
看板Examination
標題[考題] 基本電學
時間Sun Jan 13 22:53:00 2013

有一平行板電容器接於直流電壓源，
其極板電荷量為1000微庫倫，儲存5焦耳能量，
則此電容器之電容量為多少微法拉？

(A)100 (B)10 (C)1 (D)0.1

我的算法如下
W=Q*V
5=0.001*V
V=5000

W=1/2*C*V平方
5=1/2*C*5000平方
C=...沒有在選項裡><

我是哪裡算錯了啊~救命啊~~~求救高手~~~

--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.173.164.37
推 viral77321:答案是B嘛? 01/13 23:16
→ sohuge:答案是D耶...>o< 01/13 23:17
→ viral77321:0.5CV^2=5 CV^2=10 CV=1 C=V^-1 V=10 C=0.1 01/13 23:21
→ viral77321:看的董嘛 = = 01/13 23:21
推 gtzmt:w=1/2(Q/C)^2...一式解出 01/13 23:29
→ gtzmt:W=1/2(Q^2/C)才對 01/13 23:30
→ sohuge:vira...我只看得懂到 CV^2=10這裡...V要怎麼算啊? 01/13 23:34
→ sohuge:gazmt...這公式網路上找得到嗎?因為我沒念過這公式~@@~ 01/13 23:35
推 gtzmt:W=1/2(QV),Q=CV,彼此互換而來的 01/13 23:37
推 viral77321:微=10^-3 他說1000 等於1 在來就公式CV=Q 0.5CV^2=W 01/13 23:39
→ sohuge:gtzmt.太感謝了,原來還有W=1/2(QV),有這個公式就全明白了 01/13 23:44
→ sohuge:vira.微不是10^-6嗎?...@o@ 01/13 23:45
→ viral77321:我發現了 哈 我也在思考 01/13 23:46
→ sohuge:我覺得gtzmt的方法不錯...vira我們一起用吧XD 01/13 23:48
→ viral77321:CV=10^-3 0.5CV*V=5 V=10^4 C=10^-7 C=0.1*10^-6 01/13 23:49
→ viral77321:C=0.1微 對了芭 = = 01/13 23:49
→ ad58520:因為W=QV是用在點電荷的移動，不是用在電容器 01/13 23:50
→ viral77321:其實想法都對 是單位換算的問題= = 01/13 23:50
→ ad58520:點電荷的公式不能跟電容器的公式混用@@ 01/13 23:50
→ sohuge:哇,vira你的方式我要花時間看一下...目前看不懂中... 01/13 23:52
→ ad58520:gtzmt大大純粹用電容的公式代@@ 正解 01/13 23:53
→ sohuge:vira...CV=10^-3...這個是怎麼來的啊><看不懂 01/13 23:54
→ sohuge:ad58520...所以你覺得gtzmt用的公式是正確的沒錯吧? 01/13 23:55
→ viral77321:他說是1000微 1000*10^-6=10^-3 01/13 23:56
→ sohuge:vira,前兩個我看懂了,第三個V=10^4是怎麼推算來的啊? 01/13 23:59
→ viral77321:0.5C*V*V=5 C*V*V=10 (10^-3)*V=10 V=10^4 01/14 00:05
→ sohuge:vira,我終於看懂了~感謝你詳細解說~ 01/14 00:08
→ sohuge:公式換來換去的,頭腦得很清楚才行啊~~~謝謝你們喔y 01/14 00:08
推 a9421269:算久了自然就靈活了，一整本算一遍大概有80分左右 01/14 12:04
→ a9421269:兩遍就有85~90，再來就是增加一遍就增加1分，前提是要認 01/14 12:05
→ a9421269:真算，一本裡面每一章節每一題都要了解、融會貫通，滿分 01/14 12:06
→ a9421269:之路就離你不遠 01/14 12:07






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W =QV로 나와있는데. 정전에너지. W= 1/2 QV 로 알고있는데. 뭐가잘못된걸까요. Answer. 방찬수. _ 2018.04.05 09:44. 안녕하세요 전찬일님.

#60. 2 1/2d Claret Plate 2 QV 1876 London 96 numeral duplex on ...

GB 1876 QV 1d rose-red pl.150 Variety: misperforated Duplex "LONDON-W / W / 50" ... 2 1/2d Claret Plate 2 QV 1876 London 96 numeral duplex on Folded Letter.

#61. unacademy

1 !! W = + (cv)² = 1/cv². २. C. C = Q/V. W = 1/ Q². "/. 2. CV. 2. 1/2 8/2 = 1/2 0 1. Q/V. 2. 2. Qv. W = 0² = 1/½ cv² = 1/2 Qu.

#62. Eyeglasses Miu MU 2 QV 1081O1 Azure Havana/Cocoa ...

Buy Eyeglasses Miu MU 2 QV 1081O1 Azure Havana/Cocoa/Azure Tr on ... Only 1 left in stock - order soon. ... Full retail package with all accessories.

#63. Electrostatic Formula. Electric Force F = 1 q 1 q 2 = k q 1 q 2 4 ...

41 Capacitance W = QV = U ( Potential energy stored ) For a capacitor U = ½ QV ... U=1/2 QV U = ½ CV 2 U= ½ 12x10 -6 F(3V) 2 = U=1.08x10 -4 J What is the ...

#64. Chapter 2 Electrostatics

1. Chapter 2 Electrostatics. 2.1 The Electric Field: 2.1.1 Introduction ... W. −. = ∆. +. = The motion of a particle with positive charge q in a uniform.

#65. W=QV, W=1/2QV 두 공식의 차이는???

เนื้อหาของบทความนี้จะเกี่ยวกับw qv หากคุณกำลังมองหาw qvมาถอดรหัสหัวข้อw qvในโพสต์W=QV, W=1/2QV 두 공식의 차이는???นี้. Table of Contents.

#66. コンデンサーの公式と仕組みをわかりやすく解説!電池のした ...

コンデンサーの静電エネルギーは1/2(QV)でした。 この時電池はQ（C）をV(V)運んでいるので、その仕事はW＝QV となります。

#67. 도체계 정전계 - 전기기사 한솔아카데미

정전계의 에너지는 qv인데 도체계에서 에너지는 1/2에 qv더라구여 ... 첫번째 W=QV 식은 전위차가 있는 두 점 사이에는 분명히 전류가 흐를텐데 이 때 ...

#68. LM185WG-1.2-QV Texas Instruments | Mouser India

Specifications ; Reference Type: Shunt Precision References ; Output Voltage: 1.235 V ; Initial Accuracy: 1 % ; Temperature Coefficient: 150 PPM / C.

#69. 2 QV - Public Service Commission of West Virginia

1. COMPLAINT. State of West Virginia. Public Service Commission. Charleston ... Lvu ilr in a dimit,' &A;W did Lt d k rr4' 8 Dba.

#70. コンデンサーの持つエネルギー - FNの高校物理

エネルギーは密度（1／2）εE 2 でコンデンサー内の電場に蓄えられる。高校物理でコンデンサーに電荷Qを蓄えるときなされる仕事はU＝（1／2）QVと習うが、これを ...

#71. Physics equations/Electrostatics - Wikiversity

1 W =1J/s. The electron volt us a unit of energy equivalent to the potential energy of one electron at one volt of potential energy.

#72. Capacitors and Capacitance - Splung .com physics

(we assume that we started with a fully discharged capacitor), at a voltage V ... The work done is given by W=qV. ... Therefore the average work is 1/2qV.

#73. addendum to hori-mological projective duality

k ∈ [−qv, (q − 1)v), or ... DB(Y×C∗ L⊥, W)Ω −→ DB(Yss×C∗ L⊥, W) ... Letting Ei denote the character with i-th coordinate 1 and all other ...

#74. Effect of orientation in translocation of polymers through ...

N 1 − a exp− 2 qV w 1 − exp− qV. +. Na exp2. − qV w 1 − exp. − qV . 19. This is exactly the sum of the passage times for two polymer.

#75. 積體電子學題解 - HKBU

qV. 1-3 設一對平行板間之距離3厘米,且有一初速為零之電子離開底 ... W2 -W1. Å: If E is in eV and W in J, then W = 1.6 x 10-19 E. Hence,.

#76. Electric Potential and Potential Difference - StudyLib

... uniform electric field (parallel plates) to move a charge: W = qV = Fd ... is: U = 1/2QV where: V is potential difference between plates Since ...

#77. 일 W=1/2QV 아닌가요? - [필기] 타교재 질문 - Daum 카페

... 1; 댓글쓰기; 답글쓰기. 댓글 리스트. 작성자시나브로^^ 작성시간 19.10.15 Q(c)전하가 V(v) 전위차이가 나는 두 점 사이에 이동할 때 한 일 W=QV ...

#78. AS Level Physics A (H156) A Level Physics A (H556) Data ...

W t. P = Fv springs and materials. F = kx. E = 1. 2 Fx ; E = 1. 2 kx 2 ... W = 1. 2 QV ; W = 1. 2. Q2. C. ; W = 1. 2 V2C τ = CR.

#79. How to properly connect Android device orientation and ...

Rotation = new Quaternion(qv[1], -qv[3], qv[2], qv[0]); app. ... quaternion QV is stored as [w, x, y, z] // w = QV[0], x = QV[1], y = QV[2], ...

#80. Distributed Attribute-based Private Access Control - arXiv

1 ,Qv. 2 , ..., Qv. N ;W)=0,. (4) where Qv n is the query sent to Server n to access the message with access policy v. The queries are.

#81. What Are Batteries, Fuel Cells, and Supercapacitors?

Batteries are closed systems, with the anode and cathode being the ... Because the energy storage is given by energy = 1/2QV2, ...

#82. Exam Solution - nanoHUB

2qV. M₂. = (22V) M₂,. Ма h. I2 = (224) M₂ → M₂ = qV. Mă. M2 h. 0. ||. 1{}. ↑. 1- M₂ ... -1. E-Est id. 2. (E-Est id) ² - E2. 2. W. E-Borik!

#83. Phase Transitions for Mutual Information - Infoscience

Conjecture 1: For any BIMSC e and any integer d, there ... w in the right kernel of the matrix G. Then ... 1-2qv = 1-qv-qv = L Pu- L Pu = L( -1)(u1v)pu,.

#84. Distributionally Robust Secure Transmission for MISO ...

w ∈ CNt ×1 represents the beamforming vector. v ∈ CNj×1 is. AN generated by the assisting jammer with v ∼ CN(0, Qv).

#85. Intermediate state trapping of a voltage sensor - PMC - NCBI

To calculate the mid-point V1/2Q-V values, the Q-V curves were fitted to a ... A, F, Y, and W) and measured the voltage dependence of K + currents of mutant ...

#86. A Level Physics for OCR A: Year 2 - 第 149 頁 - Google 圖書結果

Substituting this equation stored energy. into W = 12 QV gives us another very useful equation for the W = 1 2 QV = 12V× (VC) or QC = 1 2QV, you get a third ...

#87. Electrical Circuit Theory and Technology - 第 49 頁 - Google 圖書結果

Energy stored W = 1 2CV2 hence V2 = 2W C and V= √( 2W C ) = √( 2× 4 12× 10−6 ) ... Energy stored W = 1 2CV2 and C = QV W=12 ( QV ) V2 =1 2QV from which V ...

#88. Electrical Circuit Theory and Technology, 5th ed

The energy, W, stored by a capacitor is given by W = 12CV2 joules Problem 16. ... Energy stored W = 1 2 Q V CV2 and C= Hence W = 1 ( Q 2 V ) V2 = 1 2QV from ...

#89. Gablota ogłoszeniowa-informacyjna 02-JB3,2-QV

Produkt 02-JB3,2-QV to Gablota wykonana została z kwadratowych profili ... Gabloty posiadają drzwi otwierane na bok, które są wyposażone w solidny zamek ...

#90. EXISTENCE AND UNIQUENESS OF MINIMAL BLOW-UP ...

where t0 < 0. i/1 solutions satisfy the conservation of energy, L2-norm and m mentum: ... +AQT -Qv + ^^tf^QvlQpl2 + ibXQv - W^Qv - \&\2Qv.

#91. Comprehensive Guide to VITEEE with 3 Online Tests 7th Edition

Ifinthree capacitorstoa of capacitance C 1 , C 2 and C3 are connectedthe series potential ... qV, while energy stored in the charged conductor is u = 1/2qV.

#92. コンデンサーの静電エネルギー - わかりやすい高校物理の部屋

つまり求めるエネルギーは U = 12 1 2 QV です。 Q = CV の関係式を代入して別の表現をすれば、 U = ...

#93. Sebuah kapasitor diberi muatan 4 µC dan mempunyai beda ...

W = 1/ 2 QV Keterangan: W = energi listrik (Joule) Q = muatan (C) V = tegangan (V) Energi yang tersimpan: W = 1/ 2 QV W = 1/2 (4 x 10^-6) ...

#94. Archiv for Pharmacie Og Technisk Chemie Med Deres ...

Naar man blander 1 Grain Svovlsyre ( S03 ) i 1000 Grains Vand með 8000 Grains af ... ei mindre end 300 qv . for at frembringe samme Virkning , som 1 W qv .

#95. 108年電子工程專業科目歷年試題澈底解說: [初考/五等]

澈底解說電能W=12CV2 ,電容C=Q V ,由這兩個公式求得電路電壓 W = 1 2 CV2 = 1 2QV ⇒ V = 2W Q = 103 2 × × 10− 5 6 = 10000V , C=Q V = 1000 10000 μC = 0.1μF 。

#96. Synchronization in Infinite-Dimensional Deterministic and ...

Sy = inf { v ( Aw , w ) + 2 ( K w , w ) ve { van we N • j = 1 W ... 0 such that under the condition Sys > St || QV7 ( 1 ) || 2 + || ( id + B ) 1 / 2QV ( t ) ...

#97. [考題] 101 初考基本電學- 看板Examination | PTT職涯區

這題能用w=qv 解嗎還是只能用w=1/2qv 解http://i.imgur.com/DnjCpQf.jpg. 求出第30的vr1 卻不知vl1 應該怎麼求才會求出80。 請板上的高手解答-- ※ 發信站: 批踢踢實業 ...