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.