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David Mack

Volts, Amps and Ohms

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36 minutes ago, David Mack said:

If you need some help understanding these:

 

8b1077e61b875344d4b99d7d110ac2ca.jpg

For me though, it looks like you need to understand volts, amps and ohms to understand the diagram, and then it doesnt work as the amp is stuck in the hole so volts are positive, ohms are between infinity and zero  but amps not moving so zero.....and then when you try and work out AmpHrs .....!

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Agree. In house joke. Only vaguely of interest cos of the rsekick.

Edited by mark99

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Amps ohms volts,

easy way to understand is to compare it to water.

Volts = water volume,

amps = water pressure

and ohms(resistance) = restriction to flow, ie smaller pipe.

best way to understand if you are not familiar with electricary. 

 

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4 hours ago, dunfixing said:

Amps ohms volts,

easy way to understand is to compare it to water.

Volts = water volume,

amps = water pressure

and ohms(resistance) = restriction to flow, ie smaller pipe.

best way to understand if you are not familiar with electricary. 

 

Up to a point...

Volts = pressure

Current = flowrate

Ohms as described

 

Chris G

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5 hours ago, dunfixing said:

Amps ohms volts,

easy way to understand is to compare it to water.

Volts = water volume,

amps = water pressure

and ohms(resistance) = restriction to flow, ie smaller pipe.

best way to understand if you are not familiar with electricary. 

 

 

10 minutes ago, Batavia said:

Up to a point...

Volts = pressure

Current = flowrate

Ohms as described

 

Chris G

That's all clear then

 

We have :

Amps = Pressure, &

Volts = Pressure

 

Maybe Ohms  = the pressure applied by the resistance

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2 minutes ago, Alan de Enfield said:

 

That's all clear then

 

We have :

Amps = Pressure, &

Volts = Pressure

 

Maybe Ohms  = the pressure applied by the resistance

Batavia is correct insofar as a water analogy works. 

 

Volts = pressure (or head, if you prefer)

Amps = flow rate, which is dictated both by the pressure and by...

Resistance = restriction to the flow. 

 

That is directly analogous to a simple circuit. 

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3 minutes ago, WotEver said:

Batavia is correct insofar as a water analogy works. 

I know.

 

It is just that (as I read it) the thread was 'If you need some help understanding these' and we have (as is usual) two totally different and conflicting answers. 

Which is not overly helpful.

 

There may not be a correct answer in such questions as "which toilet is the best", but in physics / science / maths etc there is only one correct answer, any other is incorrect.

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5 hours ago, dunfixing said:

Amps ohms volts,

easy way to understand is to compare it to water.

Volts = water volume,

amps = water pressure

and ohms(resistance) = restriction to flow, ie smaller pipe.

best way to understand if you are not familiar with electricary. 

 

I fear that you have mixed this up.  Electrical incongnoscenti take no notice of the above.  I copy, swap add a bit and repost:

 

Amps ohms volts,

easy way to understand is to compare it to water.

Volts = water pressure

charge = water volume

current = water flow rate

and ohms(resistance) = restriction to flow, ie smaller pipe.

best way to understand if you are not familiar with electricary. 

 

  • Greenie 1

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For anyone who is anything but totally conversant with electrical concepts my advice would be to expunge all memory of this thread from your brains and start again somewhere reliable.

 

The confusion sowed here could cause much anguish.

 

😣

 

N

 

 

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There's no place like ohm

There's no place like ohm

There's no place like ohm

Picture-332.png

Edited by rusty69

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5 minutes ago, Theo said:

For anyone who is anything but totally conversant with electrical concepts my advice would be to expunge all memory of this thread from your brains and start again somewhere reliable.

 

The confusion sowed here could cause much anguish.

Actually, with the exclusion of Dunfixin’s post they’ve all been correct. Some have been simpler to understand than others but none of the rest have been wrong (unless I missed something). 

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2 hours ago, WotEver said:

Actually, with the exclusion of Dunfixin’s post they’ve all been correct. Some have been simpler to understand than others but none of the rest have been wrong (unless I missed something). 

You are right, of course, but confusion is someting that is not easily (allayed (allaid? alaid?)) (oh Damn It!) got rid of so I thought that the best thing would be to forget about the whole thread and start again.  If I were a mod again I would seriously consider the deletion of the whole thread.

 

N

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Hi, I only used the water analogy because not everyone can grasp the abstract reality of electricity,

something that can’t be seen, electron charge and flow, emf, etc.

very boring when I went to collage a long time ago.

If anyone wants to look it up. Google AC theory. It will blow your mind and send you to sleep.

best not to touch the live wire while standing in a bucket of water 

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3 minutes ago, dunfixing said:

Hi, I only used the water analogy because not everyone can grasp the abstract reality of electricity,

something that can’t be seen, electron charge and flow, emf, etc.

very boring when I went to collage a long time ago.

If anyone wants to look it up. Google AC theory. It will blow your mind and send you to sleep.

best not to touch the live wire while standing in a bucket of water 

How dare you say thate electrical theory is boring!  It's something to meditate on and consider and wonder at the logic of the SI system.  How could anyone not love a definition of a volt like this:

 

"A potential differenct of 1 volt exists between two points when 1 joule of work is done in transfering 1 coulomb of charge between the two points"

 

or this

 

"A generator has an emf of 1 volt when one joule of work is done in transferring 1 coulomb of charge around the complete circuit."

 

I could go on but emotion is getting the better of me and I fear for the effect of tears of happiness on the keyboard.

 

Ah me...

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there ain't arf some bullshit spouted on this forum. ...... if only peeps would restrict their advice/comments to things that they really understand, thus avoiding unnecessary confusion and dissent.

 

 

  • Greenie 1

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19 hours ago, Murflynn said:

there ain't arf some bullshit spouted on this forum. ...... if only peeps would restrict their advice/comments to things that they really understand, thus avoiding unnecessary confusion and dissent.

 

 

I do hope that comment wasn't driected at me Mr Murflynn.  It wasn't bullshit or even cowpoo.  It was the real gen but not, in this case the slightest bit of use.

 

N

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4 hours ago, Theo said:

I do hope that comment wasn't driected at me Mr Murflynn.  It wasn't bullshit or even cowpoo.  It was the real gen but not, in this case the slightest bit of use.

 

N

not at all, Theo.  You obviously understood the inter-relationships exactly as intended by the bright spark who envisaged the piping similarity.   

 

 

 

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