I am a high school student doing a lab report on changing the number of turns of a coil and seeing the effect it has on the output voltage from a wireless charger.
I am trying to take a Qi Wireless Charger and have a coiled copper wire above it with its voltage being read from a multimeter. I have placed the coil on top of the charger and connected both terminals of the coil to a multimeter reading AC voltage. However, when I do this the voltage oscillates from 0 to a random number and back. I am unable to get a stable voltage reading and was wondering if there was a solution to this which does not require a Qi wireless charging transceiver. I have attached a picture of the setup and the inside of the charger.