2006-07-21 02:33:47 · 13 answers · asked by unknown123 2 in Computers & Internet ➔ Hardware ➔ Desktops
Because USB cables transfer power. That's how those USB memory sticks can function without an internal battery.
2006-07-21 02:35:58 · answer #1 · answered by Dan Theman 4 · 0⤊ 0⤋
On your keyboard, the numlock key has 2 functions.
1. It sends a signal via the data cable to the cpu that the user wishes to use the number pad for numerical purposes and the cpu will then adjust settings in the computer to accomodate this.
2. It also lights up a small bulb on the keyboardright above it to idicate to the user that the numlock feature is on. (propbably connected to the bulb by wire. power supplied via the data cable)
2006-07-21 02:42:51 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The keyboard is connected to the CPU. It gets the pwer from the data cable
2006-07-21 02:47:08 · answer #3 · answered by nuwanusa 5 · 0⤊ 0⤋
There is some kind of electric power supplied through the cable.
2006-07-21 02:47:36 · answer #4 · answered by ybs 2 · 0⤊ 0⤋
Push down the key NUM Lock in the left upper corner of the number pad and it will go off.
2006-07-21 02:38:21 · answer #5 · answered by ringocox 4 · 0⤊ 0⤋
USB cables transfer power. Its the same has as Usb Pens
2006-07-21 03:51:57 · answer #6 · answered by fighting9000 1 · 0⤊ 0⤋
cos it gets the power from the cpu which it is connected via a wire
2006-07-21 02:40:34 · answer #7 · answered by joey 3 · 0⤊ 0⤋
Ther is voltage being passed along that "data cable"
2006-07-21 02:36:22 · answer #8 · answered by Du 3 · 0⤊ 0⤋
If you connect your keyboard to your cpu your going to break it.
Now if you connected your keyboard to your motherboard...
2006-07-21 05:10:30 · answer #9 · answered by metal_head_3767 2 · 0⤊ 0⤋
Ghost!
2006-07-21 02:36:58 · answer #10 · answered by Scottman 2 · 0⤊ 0⤋