推 phyaim:焦耳熱功率 弦波記得成1/2 03/20 02:03
推 truth0:請問可否有計算式 03/20 02:08
→ truth0:謝謝 03/20 02:08
推 eternal:1/2（導電率）E平方 03/20 07:59
A sinusoidal electric intensity of amplotude 250(V/m) and
f=1Ghz exists in a loss dielectric medium that has a realative
permittivity permittivity of 2.5 and a loss tangent od 0.001
Find the average power dissipated in the medium per cube meter?
老實說我沒有頭緒= =
電磁波要怎麼求散逸的功率???
一點概念都沒有@@
請問這題該怎麼做??
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 59.121.141.251
※ 編輯: truth0 來自: 59.121.141.251 (03/20 01:45)