leaking current

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whatever

Just a technical question..

Due to some problems with my laptop I ended up accidentally doing an
experiment.

I wore my headphone and touched the metallic(male pin?) end of the
headphone to the usb ports and other exposed metaalic parts of my
laptop.
Result - I could hear static. even when the laptop was turned off, but
only if it was connected to AC power. When running on batteries there
was no static.

Question - why? what cld it indicate? cld it be harmful to the pc?

Thank you
 
whatever said:
Just a technical question..

Due to some problems with my laptop I ended up accidentally doing an
experiment.

I wore my headphone and touched the metallic(male pin?) end of the
headphone to the usb ports and other exposed metaalic parts of my
laptop.
Result - I could hear static. even when the laptop was turned off, but
only if it was connected to AC power. When running on batteries there
was no static.

Question - why? what cld it indicate? cld it be harmful to the pc?

Thank you
Click to expand...

What do you mean by "static" ?

A humming sound, at the A.C. line frequency ?

Paul
 
Just a technical question..

Due to some problems with my laptop I ended up accidentally doing an
experiment.

I wore my headphone and touched the metallic(male pin?) end of the
headphone to the usb ports and other exposed metaalic parts of my
laptop.
Result - I could hear static. even when the laptop was turned off, but
only if it was connected to AC power. When running on batteries there
was no static.

Question - why? what cld it indicate? cld it be harmful to the pc?
Click to expand...

It indicates that your laptop has a 3-spronge connector and that
you only have 2 of them connected :-)

Some (cheaper) laptop PSUs need to be connected to protective
ground, just as your PC.
 
@paul static - like crackling sound , 'electric' sound..
I am pretty sure its not the humming sound coz by the frequency

@Gerard - sorry but I am have no real knowledge about this. what you
said went over my head..

Thanks again!
 
whatever said:
@paul static - like crackling sound , 'electric' sound..
I am pretty sure its not the humming sound coz by the frequency

@Gerard - sorry but I am have no real knowledge about this. what you
said went over my head..

Thanks again!
Click to expand...

I tried an experiment here. I put on my expensive headphones, and
touched the plug to a screw on the plate of a light switch. I was
able to hear a little static, and it does seem to be static
electricity in that case. The screw is acting as a ground.
The volume of the static diminishes with each touch to the
screw.

With a set of cheap headphones, I didn't get any reaction at all
(because you can barely hear those ones anyway).

With the AC adapter connected, it could be providing a ground path,
to drain static electricity from you, through the headphones.

If the static noise is constant and undiminished with time, I
cannot really explain that.

Paul
 
Just a technical question..

Due to some problems with my laptop I ended up accidentally doing an
experiment.

I wore my headphone and touched the metallic(male pin?) end of the
headphone to the usb ports and other exposed metaalic parts of my
laptop.
Result - I could hear static. even when the laptop was turned off, but
only if it was connected to AC power. When running on batteries there
was no static.

Question - why? what cld it indicate? cld it be harmful to the pc?

Thank you
Click to expand...

cld and wld are not words.

This is not evidence of a problem, just an observation of
static happening all around you as it always is/does, but
that you can hear because you have the headphones on.
 
Just a technical question..

Due to some problems with my laptop I ended up accidentally doing an
experiment.

I wore my headphone and touched the metallic(male pin?) end of the
headphone to the usb ports and other exposed metaalic parts of my
laptop.
Result - I could hear static. even when the laptop was turned off, but
only if it was connected to AC power. When running on batteries there
was no static.

Question - why? what cld it indicate? cld it be harmful to the pc?

Thank you
Click to expand...

chesss, your not texting messages here. Full words needed. Also, if an
explanation given is "over your head"...give up & go back to Lego.
 
chesss, your not texting messages here. Full words needed.
Why?? is there a rule that one cannot use cld, shld or wld on the
internet??

I am not forcing u to read what I type.
Please keep your personal cultural dogmas to yourself. On the various
sites I visit it is perfectly acceptable to use u, ur, shld, wld,
cld..
If u hav a problem with dis, then DON"T READ!
Also, if an
explanation given is "over your head"...give up & go back to Lego.
Click to expand...
I appreciate your grandmotherly concern but I prefer to 'u know' ,
find things out instead of giving up..even if they go over my head
 
Why?? is there a rule that one cannot use cld, shld or wld on the
internet??

I am not forcing u to read what I type.
Please keep your personal cultural dogmas to yourself. On the various
sites I visit it is perfectly acceptable to use u, ur, shld, wld,
cld..
If u hav a problem with dis, then DON"T READ!


I appreciate your grandmotherly concern but I prefer to 'u know' ,
find things out instead of giving up..even if they go over my head
Click to expand...
Why?? is there a rule that one cannot use cld, shld or wld on the
internet??
Click to expand...
'cos ur a born eejit? yu kan't spoke propur, yu wernt teeched rite. Go
pop anuvver pill pillock. :-)
 
whatever said:
Why?? is there a rule that one cannot use cld, shld or wld on the
internet??
Click to expand...

To answer your question directly - yes there are rules here! To be more
sarcastic, you just said "cold", "shouldered" and "welded" on the internet?
What are you talking about?
I am not forcing u to read what I type.
Click to expand...

Just as well - its been through a mangler!
Please keep your personal cultural dogmas to yourself. On the various
sites I visit it is perfectly acceptable to use u, ur, shld, wld,
cld..
Click to expand...

The kind of sites you visit are your business, but you aren't on a site
here. You are in usenet. This particular group welcomes adults and children
with well developed English language skills and tends to pounce on those who
fail to confirm to the standard.
If u hav a problem with dis, then DON"T READ!
Click to expand...

and if you have a problem with the rules, then sod off.
 
whatever said:
Why?? is there a rule that one cannot use cld, shld or wld on
the internet??

I am not forcing u to read what I type. Please keep your personal
cultural dogmas to yourself. On the various sites I visit it is
perfectly acceptable to use u, ur, shld, wld, cld.. If u hav a
problem with dis, then DON"T READ!
Click to expand...

Childish use of silly abbreviations simply gets you plonked. Bye.

PLONK
 
kony said:
yes.

Any more questions?
Click to expand...
To add to that:
Maybe OP wants to ignore common practice, but that
gives us the opportunity to ridicule his command of language,
and never give a sfll nswr t hs qstns.
And note, that I am not natively speaking English.
If OP wants to be a dork, allow him to be one.
 
Somewhere on teh intarweb "Sjouke Burry" typed:
To add to that:
Maybe OP wants to ignore common practice, but that
gives us the opportunity to ridicule his command of language,
and never give a sfll nswr t hs qstns.
And note, that I am not natively speaking English.
If OP wants to be a dork, allow him to be one.
Click to expand...

Actually, there's nothing anyone on usenet can do to stop him being a dork.
So he's "allowed".

However, I won't be helping him anytime soon, unless he stops being a dork.

Regards,
 
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