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Re: [Phys-l] Show a fraudulent claim to students



The "report" also doesn't specify anything about the "100 watt light bulbs". I suspect that the bulbs may be rated at 100 watts for 120 volts. That means the effective resistance is about 144 ohms. At 50 volts a 144 ohm bulb will draw only .347 amps and produce only 17 watts. For 3 bulbs thats only 47 watts or 0.047 kilowatts, not 4.5 kilowatts.

I wonder how long it will take until someone with the group claims that all they need is one part that the government has now banned and they ask for donations to a legal fund that will fight the government to get that one part approved.

ludwik kowalski wrote:
Go to

<http://www.apfn.org/apfn/free_energy.htm>

and extract the following part of from that paper:

”In a demonstration for Reuters, a prototype -- roughly the size of a dishwasher -- was run for around 10 minutes using four 12-volt car batteries as an initial power source. Emitting a steady motorized hum, the machine powered three 100-watt light bulbs for the duration. A multimeter reading of the batteries' voltage before the device started up showed a total of 48.9 volts. When it was switched off, a second reading showed 51.2 volts, indicating that, somehow, they had been reimbursed. The machine went on to run for around two hours while photographs were taken, with no diminution in the brightness of the light bulbs, which remained lit during a short power cut. ‘The draw on the batteries was estimated at more than 4.5 kilowatts. With any existing technology the batteries would have been drained flat in one and a half minutes,’ the inventor said.”

Then ask your students what is wrong in the description. How many of them will know that four car batteries (typically 50 Ah each) will power three 100 W for two hours without being "drained flat?" And how many will notice that these three bulbs do not represent the 4500 W draw? Was it a typo (perhaps 45 such bulbs), or was it an example of ignorance? Probably ignorance; the author was promoting a fraudulent claim.

Ludwig
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