TimVK4YEH at 10:29, 30 April 2009

2009-04-30T10:29:17Z

← Older revision		Revision as of 03:29, 30 April 2009
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	==What is it?==		==What is it?==

			Ohm's Law is named after Georg Ohm, a German physicist who postulated it in 1827. His treatise described measurements of voltage and current in simple circuits, using various lengths of wire as resistors. The following diagram shows a voltage source V passing through a resistor R creating a current I

			[[Image:Ohms_law_voltage_source.svg.png \| 120px ]]

			The following diagram shows a current source I through a resistor R, causing a potential drip (voltage V)

			[[Image:Ohmslawcurrentsource.png \|165px]]

	Ohm's Law states that the current that passes between two points on a conductor is directly proportional to the [[Voltage \| potential difference]] (voltage) between the points and inversely proportional to the to the [[Resistors \|resistance]] of the conductor between the points.		Ohm's Law states that the current that passes between two points on a conductor is directly proportional to the [[Voltage \| potential difference]] (voltage) between the points and inversely proportional to the to the [[Resistors \|resistance]] of the conductor between the points.

TimVK4YEH: added initial info, internal links

2009-04-30T10:08:25Z

added initial info, internal links

New page

Related wiki pages : [[Electronic Theory]], [[Voltage]], [[Current]], [[Impedance]], [[Resistors]]

==What is it?==

Ohm's Law states that the current that passes between two points on a conductor is directly proportional to the [[Voltage | potential difference]] (voltage) between the points and inversely proportional to the to the [[Resistors |resistance]] of the conductor between the points.

so, <math>I = \frac{V}{R}</math>

where
:"I" is the current in amperes,
:"V" is the potential difference between the ends of the resistor in volts, and
:"R" is the resistance of the resistor, measured in ohms

Ohms Law can also be used in [[Impedance | impedance]] (resistance to AC) calculations thus:

<math>I = \frac{V}{Z}</math>

where
:"I" is the current in amperes,
:"V" is the potential difference between the ends of the resistor in volts, and
:"Z" is the Impedance (AC resistance) of the resistor, measured in ohms

{{electronics}}

Ohm's Law - Revision history

TimVK4YEH at 10:29, 30 April 2009

TimVK4YEH: added initial info, internal links