[題目] 電學-電容 兩題

看板Physics作者 (皮皮)時間15年前 (2010/03/22 10:53), 編輯推噓0(000)
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[領域] 電學-電容 [來源] physics for scientists and engineers 2e (randall d. knight) 課本習題 [題目] 1. Two 15-cm-diameter metal disks separated by a 0.70-mm-thick piece of Pyrex glass are charged to a potential difference of 1700V . (Dielectric constant of the Pyrex glass is 4.7 .) a.What is the surface charge density on the disks? b.What is the surface charge density on the glass? 2. Two 5mm ×5mm electrodes with a 0.10-mm-thick sheet of Mylar      between them are attached to a 9.0V battery. Without disconnecting the battery, the Mylar is withdrawn. (Very small spacers keep the electrode separation unchanged.) Dielectric constant for Mylar is 3.1 a.What is the charge before and after the Mylar is withdrawn? b.What is the potential difference before and after the Mylar is withdrawn? c.What is the electric field before and after the Mylar is withdrawn? 類似的兩題 看的懂不會解 麻煩大家了!!!   -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 163.25.118.131
文章代碼(AID): #1BfqmD3- (Physics)