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September 22, 2018, 05:03:09 am

Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"

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 Author Topic: Ohm's Law  (Read 12361 times) 0 Members and 1 Guest are viewing this topic. Click to toggle author information(expand message area).
Fu-Kwun Hwang
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 « Embed this message on: June 05, 2009, 05:21:44 pm » posted from:Taipei,T\'ai-pei,Taiwan

Ohm's Law: The current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.

$I=\frac{V}{R}$

where V is the potential difference measured across the resistance in units of volts; I is the current through the resistance in units of amperes and R is the resistance of the conductor in units of ohms (Ω).

The following applet is a simulation for AC and DC circuit.
You can click the resistor to add it to the circuit or remove it from the circuit.
The same is true for batterys for DC circuit.

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juana17
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 « Embed this message Reply #1 on: June 11, 2009, 02:51:58 pm » posted from:San Juan,Batangas,Philippines

Ohm's Law: The current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.

$I=\frac{V}{R}$

where V is the potential difference measured across the resistance in units of volts; I is the current through the resistance in units of amperes and R is the resistance of the conductor in units of ohms (Ω).

The following applet is a simulation for AC and DC circuit.
You can click the resistor to add it to the circuit or remove it from the circuit.
The same is true for batterys for DC circuit.

Ohm's law applies to electrical circuits it states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.

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Hzhane
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 « Embed this message Reply #2 on: July 16, 2009, 10:22:17 am » posted from:San Juan,Batangas,Philippines

I just remember this topic since my high school day. Thanks for the information.

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Fu-Kwun Hwang
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 « Embed this message Reply #3 on: May 17, 2010, 09:24:09 pm » posted from:Taipei,T\'ai-pei,Taiwan

$R\equiv\frac{V}{I}$ is definition of resistor. This relation alone is not Ohm's law.

We say a resistor obey ohm's law if it's resistance R is a constant. i.e. Voltage divided by current is a constant.
Current is propotional to voltage in a linear way.
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josephmerry
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 « Embed this message Reply #4 on: July 24, 2018, 04:35:41 pm »

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Progress is impossible without change; and those who cannot change their minds cannot change anything. ..."George Bernard Shaw(1865-1950, Irish dramatist, essayist and critic, Nobel Prize for Literature 1925)"