
Through daily experience with common household equipment, many people should have noticed the terms AC and DC voltage and / or current; for example on a car battery which outputs 12V DC voltage or a household lighting lamp which needs 230V AC voltage. Yet only very few people can actually realize even that there are differences between AC and DC current, let alone understand the differences themselves. The purpose of this article is to explain the main characteristics and highlight the differences of AC and DC current, in terms understandable by people with very low or without technical expertise, along with providing some encyclopedic knowledge on the subject.

Through daily experience with common household equipment, many people should have noticed the terms AC and DC voltage and / or current; for example on a car battery which outputs 12V DC voltage or a household lighting lamp which needs 230V AC voltage. Yet only very few people can actually realize even that there are differences between AC and DC current, let alone understand the differences themselves. The purpose of this article is to explain the main characteristics and highlight the differences of AC and DC current, in terms understandable by people with very low or without technical expertise, along with providing some encyclopedic knowledge on the subject.
Prev1 of 4Next After an exhausting and relatively unproductive week at Computex Taipei, I wanted to unwind by putting the latest AMD APU under sub-zero cooling to see how...
Ironlaw | June 10, 2013
Preetam Nath | June 7, 2013
[EXCLUSIVE] Sony Togari to be named Xperia ZU, to be announced on June 25th?
Ironlaw | June 4, 2013
Lennard Seah | June 1, 2013
Kenny Doan | June 19, 2013
NVIDIA licenses out Kepler GPU core tech to get a bigger piece of mobile pie
Derek Strickland | June 19, 2013
New screens for Shadow Warrior reveal a unique hack-and-slash FPS hybrid
Kenny Doan | June 19, 2013
The Witcher 3 for PC will ‘definitely’ have free DLC, consoles might not
Brandon Shutt | June 19, 2013
Creators of highest grossing iOS app secure $15m for office suite
Brandon Shutt | June 19, 2013
Super-minimal keyboard ‘Minuum’ beta launching today in Android store
Hammad Saleem | June 19, 2013
Lenovo launches Thinkpad S531 UltraBook without Haswell inside

After a very successful collaboration concert with Maximum the Hormone yesterday night, Perfume announced their new album and Dome live concerts. The Perfume Fes! line of concerts is a first for the ladies, collaborating with Saito Kazuyoshi, Okuda Tamio and Maximum the... Read More »

手機老是被操到沒電、就連多帶一顆行動電源也覺得不夠用,該怎麼辦呢?圖中這部收音機或許可以幫上忙。 收音機?沒聽錯吧!事實上收音機只是 Sony ICF-B88 其中一項功能。這是一款定位在緊急用途的收音機,可接收 FM/AM 二波段廣播,配備伸縮式天線,讓你身處偏遠地區也不會擔心錯過重要資訊;不過,Sony ICF-B88 最特殊之處在於支援 3 種充電方式,除了可透過 USB 線為內建鎳氫電池充電,此外頂部還配備太陽能面板,也能將光能轉換成電能;若你周遭也無任何光源,還可選擇轉動手把用手搖的方式充電,若以每秒 2 轉的速度轉動手把 1 分鐘,大約可提供聆聽 FM 廣播約 50 分鐘(輸出功率需為 1mW)的續電力,當然這些儲存的電力,都可以透過 USB 線幫手機等行動裝置充電。 其他部份,Sony ICF-B88 還內建 LED 手電筒、配有 3.5mm ...
© 1999 - 2013 VR Media Pte. Ltd.
