my cellphone charger and my razor charger both emit high pitched noises while charging. what is the reason behind this noise? i'm interested in the specific physics and the specific parts that cause this.
2006-12-20 19:32:49 · 2 answers · asked by k7lim 1 in Consumer Electronics ➔ Other - Electronics
The size of transformers depends on the frequency of the AC and the current taken. Lower frequency - larger transformer. To keep the size and weight of transformers down, an extra switching circuit is used. This rectifies the 50/60Hz AC into DC, It then switches this DC at 15kHz or so before passing into a *much* smaller transformer. It is this switching frequency you are hearing - it is quite normal.
This technology is called a switched mode power suppy
2006-12-21 00:23:31 · answer #1 · answered by amania_r 7 · 0⤊ 0⤋
My brother had a razor, and it never made any sounds while charging. But he always had other problems with it, and had to return it multiple times for a new one. I would say there could be a short somewhere in the charger or the phone itself. I would call the company you purchased it from and ask them if that is normal, and if not if it is a defect. I'm sorry if im not much help.
2006-12-20 19:49:17 · answer #2 · answered by Silence06 2 · 0⤊ 1⤋