Quote: Originally posted by morgz84 on 16/3/2012
Nonsense. Current does not get higher as the voltage increases, it decreases!! Why do people insist on spreading misinformation?
It's not nonsense, it's Ohm's Law.
Electrical current is a flow of electrons, analagous to a flow of water in a stream. Voltage is analagous to the steepness of the hill down which the stream is flowing.
A steeper hill produces a faster flow, just as a higher voltage produces more current.
You are assuming that P = VI means that current goes up as voltage goes down. But the power is not constant.
Take a 60W bulb and connect it to a torch battery with a low voltage. If your analysis is correct, the current would be huge and the bulb would be really bright because the power is a constant 60W.
But your analysis is not correct: The 60W bulb will give barely a glimmer because it's designed to produce 60W at 230V. At the tiny voltage of 1.5V, the current will be tiny and the power output will be tiny.
If you still believe this is nonsense, go and try it and tell us if you get a bright light.
All we have proved, is that it is not a simple matter!
In an effort to resolve the original query ... can I point you at the site below ... it contains a simple tool for calculating, as well as outlining the various theories and parameters discussed.
Don't try to understand it ... just use it ... and you'll get useful answers to any mix of two numbers you care to enter. Note the second calculator at the very end. Don't be concerned about the 'acoustic' bent of the site ... electrical laws still apply.
Nonsense. Current does not get higher as the voltage increases, it decreases!! Why do people insist on spreading misinformation? Quote: Originally posted by morgz84 on 16/3/2012
Who is spreading misinformation? If you refer to the above link you will see that the experts agree,increased voltage leads to an increase in Amps
Having been accused of being a devious politician and an Idiot it's refreshing to see that there is someone else on this forum that understands OHM's law.Thank you Sanhozay.
All we have proved, is that it is not a simple matter!
In an effort to resolve the original query ... can I point you at the site below ... it contains a simple tool for calculating, as well as outlining the various theories and parameters discussed.
Don't try to understand it ... just use it ... and you'll get useful answers to any mix of two numbers you care to enter. Note the second calculator at the very end. Don't be concerned about the 'acoustic' bent of the site ... electrical laws still apply.
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Topic: how many amps for a 1.5kw heater? (
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