I am performing a science fair project where I test power outlets to see if plugged-in chargers continue to produce electricty whether the phone is charging or not. I am testing using a Kil-a-Watt Meter, a phone charger, and a phone itself. I am just confused. What would be the control group of this experiment?|||Jason,
The control should be a switch that completely disconnects all power from the outlet. Next place a digital ammeter that has ranges in amps, milli-amps and micro-amps. Most digital multimeter's have this capability.
Close your switch with nothing pligged into the outlet. You should read zero or very close to zero. Record this value if any. This is your control measurement. Lets say you read 1 micro-amp with nothing hooked up.
Now plug in each of your devices and record the readings from the ammeter. Subtract the 1 micro-amp and you have what each device was drawing from the system.
Hope this helps,
Newton1Law|||You could buy a charger that has an on / off switch - but no charger would be the same...
In other words there is no control group in this experiment...
"if plugged-in chargers continue to produce electricity"...
I assume you mean "if plugged-in chargers continue to CONSUME electricity"...
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