> > > >---- Original Message ---- >From: [EMAIL PROTECTED] >To: debian-user@lists.debian.org >Subject: Re: OT: volt and current (ALSA sound recording frustration) >Date: Fri, 28 Nov 2008 17:16:47 -0200 > >>lee escreveu: >>> On Fri, Nov 28, 2008 at 06:59:06PM +0000, Tzafrir Cohen wrote: >>> >>> >>>> A voltmeter has two connectors and shows the potential >differences >>>> between them. >>>> >>>> This is unlike an Ampermeter that shows the current flowing >through it. >>>> >>> >>> If you have a multimeter that can measure voltage or current, both >>> modes are basically the same. The difference is only in where most >of >>> the current flows. >>> >>> Is it even possible to measure a mere potential >> >>Actually, they're two completely different ways of measuring two >>different things. They just happen to be measureable with the same >>equipment, but this equipment combines two functionalities into a >single >>physical device. >> >>-- >>Eduardo M Kalinowski >>[EMAIL PROTECTED] >> The voltmeter is usually placed in parallel with the two (plus and minus if DC) connections. the voltmeter has a large but known internal resistance. If it really is a meter (with a needle rather than a digital readout)the deflection is actually a measure of the (small) current through the (large) resistance. The ammeter is usually placed in series with the connection and, soas not to affect the current flow, usually has a small internal resistance. Again the deflection of the "needle" is a measure of the current. Larry >> >>-- >>To UNSUBSCRIBE, email to [EMAIL PROTECTED] >>with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED] >ebian.org >> >> >>
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